Subtract 90/8 from 56/15, Solve 3 11/15

Subtract 90/8 from 56/15

1^st number: 3 11/15, 2^nd number: 11 2/8

56/15 - 90/8 is -451/60.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 8 is 120

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 15 × 8 = 120,
56/15 = 56 × 8/15 × 8 = 448/120
Likewise, for the 2nd fraction, since 8 × 15 = 120,
90/8 = 90 × 15/8 × 15 = 1350/120
Subtract the two like fractions:
448/120 - 1350/120 = 448 - 1350/120 = -902/120
After reducing the fraction, the answer is -451/60

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