Question

A brand of cereal had 1.21.21, point, 2 milligrams (\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\,\text{mg}1.8mg1, point, 8, start text, m, g, end text of iron per serving.

What was the percent increase in iron?

Answer 1

50%

Explanation:

i got it wrong

Answer 2

There was 49.58
`\%` increase in iron

Explanation:

Given:

Previously iron content= 1.21 mg per serving.

Current iron content= 1.81 mg per serving.

Amount of irons increased = Current iron content - Previously iron content =
`1.81-1.21=0.6 \ mg`

Now

Percentage of amount increased =
`\frac{\textrm{Amount of irons increased}}{Previously iron content}* 100=(0.6)/(1.21)*100=49.58 \ \%`