Subtract 63/10 from 21/24, Solve 21/24

Subtract 63/10 from 21/24

1^st number: 21/24, 2^nd number: 6 3/10

21/24 - 63/10 is -217/40.

Find the least common denominator or LCM of the two denominators:
LCM of 24 and 10 is 120

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 24 × 5 = 120,
21/24 = 21 × 5/24 × 5 = 105/120
Likewise, for the 2nd fraction, since 10 × 12 = 120,
63/10 = 63 × 12/10 × 12 = 756/120
Subtract the two like fractions:
105/120 - 756/120 = 105 - 756/120 = -651/120
After reducing the fraction, the answer is -217/40

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