inline percentHeiught and percentWidth as they are used only in one case each

src/ImageSharp/Processing/ResizeHelper.cs

@@ -333,10 +333,6 @@ namespace SixLabors.ImageSharp.Processing
                 return (new Size(sourceWidth, sourceWidth), new Rectangle(0, 0, sourceWidth, sourceHeight));
             }
 
-            // Fractional variants for preserving aspect ratio.
-            float percentHeight = MathF.Abs(height / (float)sourceHeight);
-            float percentWidth = MathF.Abs(width / (float)sourceWidth);
-
             // Find the shortest distance to go.
             int widthDiff = sourceWidth - width;
             int heightDiff = sourceHeight - height;
@@ -360,12 +356,14 @@ namespace SixLabors.ImageSharp.Processing
                 if (height > width)
                 {
                     destinationWidth = width;
+                    float percentWidth = MathF.Abs(width / (float)sourceWidth);
                     destinationHeight = (int)MathF.Round(sourceHeight * percentWidth);
                     height = destinationHeight;
                 }
                 else
                 {
                     destinationHeight = height;
+                    float percentHeight = MathF.Abs(height / (float)sourceHeight);
                     destinationWidth = (int)MathF.Round(sourceWidth * percentHeight);
                     width = destinationWidth;
                 }