Subtract 90/7 from 24/36, Solve 24/36

Subtract 90/7 from 24/36

1^st number: 24/36, 2^nd number: 12 6/7

24/36 - 90/7 is -256/21.

Find the least common denominator or LCM of the two denominators:
LCM of 36 and 7 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 36 × 7 = 252,
24/36 = 24 × 7/36 × 7 = 168/252
Likewise, for the 2nd fraction, since 7 × 36 = 252,
90/7 = 90 × 36/7 × 36 = 3240/252
Subtract the two like fractions:
168/252 - 3240/252 = 168 - 3240/252 = -3072/252
After reducing the fraction, the answer is -256/21

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