Subtract 48/42 from 12/36, Solve 12/36

Subtract 48/42 from 12/36

1^st number: 12/36, 2^nd number: 1 6/42

12/36 - 48/42 is -17/21.

Find the least common denominator or LCM of the two denominators:
LCM of 36 and 42 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 36 × 7 = 252,
12/36 = 12 × 7/36 × 7 = 84/252
Likewise, for the 2nd fraction, since 42 × 6 = 252,
48/42 = 48 × 6/42 × 6 = 288/252
Subtract the two like fractions:
84/252 - 288/252 = 84 - 288/252 = -204/252
After reducing the fraction, the answer is -17/21

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