Question

Jamie burned 480 calories in an exercise

class on Monday. She took a different class
the next day and burned 7/8 as many
calories as she did on Monday. How many
calories did she burn on Tuesday?

Answer 1

Answer: Jamie burned 420 calories on Tuesday

Explanation:

Cross method is best for this question

Let x = calories burnt on tuesday
480 is 100%
x is 7/8 (or 87.5%)

∴
(480*87.5%) ÷ 100%
= 420 ÷ 100%
= 420

Therefore, Jamie burned 420 calories on Tuesday