Subtract 42/20 from 3/27, Solve 3/27

Subtract 42/20 from 3/27

1^st number: 3/27, 2^nd number: 2 2/20

3/27 - 42/20 is -179/90.

Find the least common denominator or LCM of the two denominators:
LCM of 27 and 20 is 540

Next, find the equivalent fraction of both fractional numbers with denominator 540
For the 1st fraction, since 27 × 20 = 540,
3/27 = 3 × 20/27 × 20 = 60/540
Likewise, for the 2nd fraction, since 20 × 27 = 540,
42/20 = 42 × 27/20 × 27 = 1134/540
Subtract the two like fractions:
60/540 - 1134/540 = 60 - 1134/540 = -1074/540
After reducing the fraction, the answer is -179/90

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