Subtract 28/40 from 24/15, Solve 1 9/15

Subtract 28/40 from 24/15

1^st number: 1 9/15, 2^nd number: 28/40

24/15 - 28/40 is 9/10.

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,
24/15 = 24 × 8/15 × 8 = 192/120
Likewise, for the 2nd fraction, since 40 × 3 = 120,
28/40 = 28 × 3/40 × 3 = 84/120
Subtract the two like fractions:
192/120 - 84/120 = 192 - 84/120 = 108/120
After reducing the fraction, the answer is 9/10

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