Subtract 7/40 from 84/15, Solve 5 9/15

Subtract 7/40 from 84/15

1^st number: 5 9/15, 2^nd number: 7/40

84/15 - 7/40 is 217/40.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 40 is 120

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 15 × 8 = 120,
84/15 = 84 × 8/15 × 8 = 672/120
Likewise, for the 2nd fraction, since 40 × 3 = 120,
7/40 = 7 × 3/40 × 3 = 21/120
Subtract the two like fractions:
672/120 - 21/120 = 672 - 21/120 = 651/120
After reducing the fraction, the answer is 217/40
In mixed form: 517/40

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