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Percent problems

Problem

A brand of cereal had 1.2 milligrams (mg) of iron per serving. Then they changed their recipe so they had 1.8mg of iron per serving.
What was the percent increase in iron?
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3/5
  • a simplified improper fraction, like 7/4
  • a mixed number, like 1 3/4
  • an exact decimal, like 0.75
  • a multiple of pi, like 12 pi or 2/3 pi
%
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