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Percent problems

Problem

A brand of cereal had 1, point, 2 milligrams left parenthesis, start text, m, g, end text, right parenthesis of iron per serving. Then they changed their recipe so they had 1, point, 8, start text, m, g, end text 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, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, start text, p, i, end text or 2, slash, 3, space, start text, p, i, end text
percent
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