The ratio of flour cups to sugar cups can be illustrted as below:
4 cups of flour= 2 cups of of sugar cups
so x cups of flour = 42 cups of sugar
Lets cross multiply :
x * 2 = 4 * 42
2x = 168 ..... divide by 2 both sides :
x =168/2 = 84
• This means 84 cups of flour is needed in order to correspond with 42 cups of sugar.