Subtract 72/36 from 7/42, Solve 7/42

Subtract 72/36 from 7/42

1^st number: 7/42, 2^nd number: 2 0/36

7/42 - 72/36 is -11/6.

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

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 42 × 6 = 252,
7/42 = 7 × 6/42 × 6 = 42/252
Likewise, for the 2nd fraction, since 36 × 7 = 252,
72/36 = 72 × 7/36 × 7 = 504/252
Subtract the two like fractions:
42/252 - 504/252 = 42 - 504/252 = -462/252
After reducing the fraction, the answer is -11/6

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