Question

A brand of cereal had 1.21.2 1.2 1, point, 2 milligrams (mg)(\text{mg}) (mg) left parenthesis, start text, m, g, end text, right parenthesis of iron per serving. Then they changed their recipe so they had 1.8 mg1.8\,\text{mg} 1.8mg 1, point, 8, start text, m, g, end text of iron per serving. What was the percent increase in iron? %\% %

Answer 1

The percent increase in iron is 50 %.

Explanation:

We know that the initial value of iron in a brand of cereal is 1.2 mg of iron per serving and the new value is 1.8 mg of iron per serving.

To find the percentage change in iron you must:

1. Subtract the initial value from the new value:

`1.8-1.2=0.6`

2. Divide that change by the initial value

`(0.6)/(1.2) = (6)/(12)=0.5`

3. Convert that to a percentage (by multiplying by 100 and adding a "%" sign)

`0.5\cdot 100=50\:\%`

The percent increase in iron is 50 %.