Percentage value fix

Author: TylerBrinks

src/ExCSS.Tests/PropertyTests/OpacityPropertyTests.cs

@@ -11,9 +11,30 @@ public void OpacityPercentLegal()
         Assert.Equal("opacity", property.Name);
         Assert.False(property.IsImportant);
         Assert.IsType<OpacityProperty>(property);
-        var concrete = (OpacityProperty)property;
-        Assert.False(concrete.IsInherited);
-        Assert.True(concrete.HasValue);
-        Assert.Equal("50%", concrete.Value);
+        var result = (OpacityProperty)property;
+        Assert.False(result.IsInherited);
+        Assert.True(result.HasValue);
+        Assert.Equal("50%", result.Value);
+    }
+
+    
+    [Fact]
+    public void OpacityVarianceTests()
+    {
+        var property = ParseDeclaration("opacity: 50%");
+        var result = (OpacityProperty)property;
+        Assert.Equal("50%", result.Value);
+
+        property = ParseDeclaration("opacity: .50");
+        result = (OpacityProperty)property;
+        Assert.Equal("50%", result.Value);
+
+        property = ParseDeclaration("opacity: 1");
+        result = (OpacityProperty)property;
+        Assert.Equal("100%", result.Value);
+
+        property = ParseDeclaration("opacity: 0");
+        result = (OpacityProperty)property;
+        Assert.Equal("0%", result.Value);
     }
 }

src/ExCSS/Extensions/ValueExtensions.cs

@@ -111,7 +111,7 @@ public static Length ToLength(this FontSize fontSize)
             try
             {
                 var number = token.Value;
-                var percentage = number / 100;
+                var percentage = number * 100;
                 return new Percent(percentage);
             }
             catch