Subtract 90/24 from 28/15, Solve 1 13/15

Subtract 90/24 from 28/15

1^st number: 1 13/15, 2^nd number: 3 18/24

28/15 - 90/24 is -113/60.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 24 is 120

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 15 × 8 = 120,
28/15 = 28 × 8/15 × 8 = 224/120
Likewise, for the 2nd fraction, since 24 × 5 = 120,
90/24 = 90 × 5/24 × 5 = 450/120
Subtract the two like fractions:
224/120 - 450/120 = 224 - 450/120 = -226/120
After reducing the fraction, the answer is -113/60

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