Subtract 30/36 from 24/21, Solve 1 3/21

Subtract 30/36 from 24/21

1^st number: 1 3/21, 2^nd number: 30/36

24/21 - 30/36 is 13/42.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 36 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 21 × 12 = 252,
24/21 = 24 × 12/21 × 12 = 288/252
Likewise, for the 2nd fraction, since 36 × 7 = 252,
30/36 = 30 × 7/36 × 7 = 210/252
Subtract the two like fractions:
288/252 - 210/252 = 288 - 210/252 = 78/252
After reducing the fraction, the answer is 13/42

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