Question

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

0.02 mg
450 mg ®
50 mg
1,200 mg​

Answer 1

450mg
30% is 30 out of 100 which can also be written as 0.3.
30% of a days supply can mathematically be written as
30% x 1500 or 1500x 0.3

Answer 2

450mg

Explanation: