You can
put this solution on YOUR website!
Lets deal in tablespoons
white sugar=1/4 cup=(1/4)*16=4 tablespoons
brown sugar=1/2 cup=(1/2)*16=8 tablespoons
Total amount of sugar called for=4+8=12 tablespoons
Amount of cornstarch called for=2 tablespoons
cornstarch = 2/12=1/6 of the total amount of sugar called for
Hope this helps---ptaylor