Subtract 24/21 from 24/15, Solve 1 9/15

Subtract 24/21 from 24/15

1^st number: 1 9/15, 2^nd number: 1 3/21

24/15 - 24/21 is 16/35.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 21 is 105

Next, find the equivalent fraction of both fractional numbers with denominator 105
For the 1st fraction, since 15 × 7 = 105,
24/15 = 24 × 7/15 × 7 = 168/105
Likewise, for the 2nd fraction, since 21 × 5 = 105,
24/21 = 24 × 5/21 × 5 = 120/105
Subtract the two like fractions:
168/105 - 120/105 = 168 - 120/105 = 48/105
After reducing the fraction, the answer is 16/35

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