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Add and subtract fractions: word problems 1

Nadia ate 11 slice of pizza. Tiffany ate 11 slice.
If there were initially 33 slices and all the slices are the same size, what fraction of the pizza is remaining?
  • Your answer should be
  • an integer, like 66
  • a simplified proper fraction, like 3/53/5
  • a simplified improper fraction, like 7/47/4
  • a mixed number, like 1 3/41\ 3/4
  • an exact decimal, like 0.750.75
  • a multiple of pi, like 12 pi12\ \text{pi} or 2/3 pi2/3\ \text{pi}