diff --git a/AndroidCalculator/Base.lproj/Main.storyboard b/AndroidCalculator/Base.lproj/Main.storyboard
index 0769092..42e88bb 100644
--- a/AndroidCalculator/Base.lproj/Main.storyboard
+++ b/AndroidCalculator/Base.lproj/Main.storyboard
@@ -16,7 +16,7 @@
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                         <subviews>
                             <view contentMode="scaleToFill" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="srp-dc-mcA">
-                                <rect key="frame" x="280" y="-20" width="116" height="707"/>
+                                <rect key="frame" x="275" y="-20" width="116" height="707"/>
                                 <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
                                 <color key="backgroundColor" systemColor="systemGroupedBackgroundColor" red="0.94901960780000005" green="0.94901960780000005" blue="0.96862745100000003" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                             </view>
@@ -155,7 +155,7 @@
                                 </state>
                             </button>
                             <button opaque="NO" contentMode="scaleToFill" fixedFrame="YES" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="I4O-WX-Rsc">
-                                <rect key="frame" x="104" y="205" width="80" height="80"/>
+                                <rect key="frame" x="104" y="205" width="168" height="80"/>
                                 <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
                                 <fontDescription key="fontDescription" type="system" pointSize="38"/>
                                 <state key="normal" title="+/-">
@@ -163,35 +163,33 @@
                                 </state>
                             </button>
                             <button opaque="NO" contentMode="scaleToFill" fixedFrame="YES" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="Dlz-OI-x3i">
-                                <rect key="frame" x="192" y="205" width="80" height="80"/>
+                                <rect key="frame" x="280" y="205" width="80" height="80"/>
                                 <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
-                                <fontDescription key="fontDescription" type="system" pointSize="38"/>
-                                <state key="normal" title="%">
-                                    <color key="titleColor" cocoaTouchSystemColor="darkTextColor"/>
-                                </state>
+                                <fontDescription key="fontDescription" type="system" weight="semibold" pointSize="18"/>
+                                <state key="normal" title="%"/>
                             </button>
                             <button opaque="NO" contentMode="scaleToFill" fixedFrame="YES" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="icb-C3-YOh">
-                                <rect key="frame" x="288" y="536" width="80" height="100"/>
+                                <rect key="frame" x="280" y="557" width="80" height="80"/>
                                 <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
-                                <fontDescription key="fontDescription" type="system" pointSize="52"/>
+                                <fontDescription key="fontDescription" type="system" weight="light" pointSize="34"/>
                                 <state key="normal" title="+"/>
                             </button>
                             <button opaque="NO" contentMode="scaleToFill" fixedFrame="YES" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="JAI-XN-CDt">
-                                <rect key="frame" x="288" y="428" width="80" height="100"/>
+                                <rect key="frame" x="280" y="469" width="80" height="80"/>
                                 <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
-                                <fontDescription key="fontDescription" type="system" pointSize="52"/>
+                                <fontDescription key="fontDescription" type="system" weight="light" pointSize="42"/>
                                 <state key="normal" title="-"/>
                             </button>
                             <button opaque="NO" contentMode="scaleToFill" fixedFrame="YES" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="cuz-9a-BkO">
-                                <rect key="frame" x="288" y="320" width="80" height="100"/>
+                                <rect key="frame" x="280" y="381" width="80" height="80"/>
                                 <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
-                                <fontDescription key="fontDescription" type="system" pointSize="52"/>
+                                <fontDescription key="fontDescription" type="system" weight="light" pointSize="34"/>
                                 <state key="normal" title="×"/>
                             </button>
                             <button opaque="NO" contentMode="scaleToFill" fixedFrame="YES" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="RA4-Vt-6OG">
-                                <rect key="frame" x="288" y="212" width="80" height="100"/>
+                                <rect key="frame" x="280" y="293" width="80" height="80"/>
                                 <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
-                                <fontDescription key="fontDescription" type="system" pointSize="52"/>
+                                <fontDescription key="fontDescription" type="system" weight="light" pointSize="34"/>
                                 <state key="normal" title="÷"/>
                             </button>
                             <view contentMode="scaleToFill" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="hLf-ut-UVB">