Subtract 80/42 from 50/27, Solve 1 23/27

Subtract 80/42 from 50/27

1^st number: 1 23/27, 2^nd number: 1 38/42

50/27 - 80/42 is -10/189.

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

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 27 × 14 = 378,
50/27 = 50 × 14/27 × 14 = 700/378
Likewise, for the 2nd fraction, since 42 × 9 = 378,
80/42 = 80 × 9/42 × 9 = 720/378
Subtract the two like fractions:
700/378 - 720/378 = 700 - 720/378 = -20/378
After reducing the fraction, the answer is -10/189

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