Subtract 42/4 from 20/27, Solve 20/27

Subtract 42/4 from 20/27

1^st number: 20/27, 2^nd number: 10 2/4

20/27 - 42/4 is -527/54.

Find the least common denominator or LCM of the two denominators:
LCM of 27 and 4 is 108

Next, find the equivalent fraction of both fractional numbers with denominator 108
For the 1st fraction, since 27 × 4 = 108,
20/27 = 20 × 4/27 × 4 = 80/108
Likewise, for the 2nd fraction, since 4 × 27 = 108,
42/4 = 42 × 27/4 × 27 = 1134/108
Subtract the two like fractions:
80/108 - 1134/108 = 80 - 1134/108 = -1054/108
After reducing the fraction, the answer is -527/54

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