Question

A certain recipe requires 458 cups of flour and 659 cups of sugar. a) If 3/8 of the recipe is to be made, how much sugar is needed?

If the above ingredients are required for one batch, find the amount of flour needed for a double batch.

Answer 1

a) To make 3/8 of the recipe calculate 3/8 of each ingredient.

This is how to do it:

Flour: 458 cups * 3/8 = 3* 458 / 8 cups = 3*229/4 cups = 687/4 cups = 171.75 cups = 171 and 3/4 cups

Sugar: 659 cups * 3/8 = 3*659 / 8 = 1977 / 8 cups = 247.125 cups = 247 and 1/8 cup.

For a double batch multiply all the ingredients by 2:

Flour: [687 /4] * 2 = 687/2 = 343.5 cups = 343 and 1/2 cups

Sugar: [1977/8]*2 = 1977/4 = 494.25 cups = 494 and 1/4 cups.