A brand of cereal had 1.2 (mg) of iron per serving. Then they changed their recipe so they had 1.8 mg of iron per serving.

Answer 1

the changed recipe has 50% more iron

or 150% as much iron

1.8/1.2 = 3/2 = 1.5 = 150% as much

(1.8-1.2)/1.2= .6/1.2 = .5 = 50% more