Subtract 80/49 from 21/24, Solve 21/24

Subtract 80/49 from 21/24

1^st number: 21/24, 2^nd number: 1 31/49

21/24 - 80/49 is -297/392.

Find the least common denominator or LCM of the two denominators:
LCM of 24 and 49 is 1176

Next, find the equivalent fraction of both fractional numbers with denominator 1176
For the 1st fraction, since 24 × 49 = 1176,
21/24 = 21 × 49/24 × 49 = 1029/1176
Likewise, for the 2nd fraction, since 49 × 24 = 1176,
80/49 = 80 × 24/49 × 24 = 1920/1176
Subtract the two like fractions:
1029/1176 - 1920/1176 = 1029 - 1920/1176 = -891/1176
After reducing the fraction, the answer is -297/392

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