Question

5. A food contains 30% of a day's supply ofcalcium for a particular person. If that personrequires 1,500 mg of calcium, how muchcalcium does the food contain?

Answer 1

The food contains 450 mg of Calcium.

Explanation:

This question can be solved using a rule of three.

The person requires 1500 mg of Calcium. The food contains 30%. So

`(30)/(100)\ast1500=30\ast(1500)/(100)=30\ast15=450`

The food contains 450 mg of Calcium.