Subtract 70/36 from 8/42, Solve 8/42

Subtract 70/36 from 8/42

1^st number: 8/42, 2^nd number: 1 34/36

8/42 - 70/36 is -221/126.

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,
8/42 = 8 × 6/42 × 6 = 48/252
Likewise, for the 2nd fraction, since 36 × 7 = 252,
70/36 = 70 × 7/36 × 7 = 490/252
Subtract the two like fractions:
48/252 - 490/252 = 48 - 490/252 = -442/252
After reducing the fraction, the answer is -221/126

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