Subtract 7/5 from 42/27, Solve 1 15/27

Subtract 7/5 from 42/27

1^st number: 1 15/27, 2^nd number: 1 2/5

42/27 - 7/5 is 7/45.

Find the least common denominator or LCM of the two denominators:
LCM of 27 and 5 is 135

Next, find the equivalent fraction of both fractional numbers with denominator 135
For the 1st fraction, since 27 × 5 = 135,
42/27 = 42 × 5/27 × 5 = 210/135
Likewise, for the 2nd fraction, since 5 × 27 = 135,
7/5 = 7 × 27/5 × 27 = 189/135
Subtract the two like fractions:
210/135 - 189/135 = 210 - 189/135 = 21/135
After reducing the fraction, the answer is 7/45

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