Subtract 63/42 from 36/72, Solve 36/72

Subtract 63/42 from 36/72

1^st number: 36/72, 2^nd number: 1 21/42

36/72 - 63/42 is -1/1.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 42 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 72 × 7 = 504,
36/72 = 36 × 7/72 × 7 = 252/504
Likewise, for the 2nd fraction, since 42 × 12 = 504,
63/42 = 63 × 12/42 × 12 = 756/504
Subtract the two like fractions:
252/504 - 756/504 = 252 - 756/504 = -504/504
After reducing the fraction, the answer is -1/1

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