Subtract 70/27 from 4/42, Solve 4/42

Subtract 70/27 from 4/42

1^st number: 4/42, 2^nd number: 2 16/27

4/42 - 70/27 is -472/189.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 27 is 378

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 42 × 9 = 378,
4/42 = 4 × 9/42 × 9 = 36/378
Likewise, for the 2nd fraction, since 27 × 14 = 378,
70/27 = 70 × 14/27 × 14 = 980/378
Subtract the two like fractions:
36/378 - 980/378 = 36 - 980/378 = -944/378
After reducing the fraction, the answer is -472/189

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