Ali has 16 1/2 yards of fabric. She will use 5 2/5 yards to make each costume. How many costumes can Ali make?

Answer 1

divide 16 1/2 by 5 2/5

first create an improper fraction (multiply number by denominator, then add it to the numerator)

then divide the fractions (multiply by the reciprocal/opposite of the second number)