if fran's fudge recipe calls for 2 1/2 cups of sugar and she increases it by 2/5 of a cup how much sugar does she use
2.9
or in a Fraction 2 9/10
2 1/2 = 2 + 1 / 2 = 4 / 2 + 1 / 2 = 5 / 2
2 1/2 + 2 / 5 = 5 / 2 + 2 / 5 =
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Remark.
Write these two fractions so that their denominator is ten.
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5 • 5 / 5 • 2 + 2 • 2 / 2 • 5 =
25 / 10 + 4 / 10 = 29 / 10
Also:
29 / 10 = 2.9
and
29 / 10 = 20 / 10 + 9 / 10 = 2 9/10