Subtract 30/42 from 28/27, Solve 1 1/27

Subtract 30/42 from 28/27

1^st number: 1 1/27, 2^nd number: 30/42

28/27 - 30/42 is 61/189.

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,
28/27 = 28 × 14/27 × 14 = 392/378
Likewise, for the 2nd fraction, since 42 × 9 = 378,
30/42 = 30 × 9/42 × 9 = 270/378
Subtract the two like fractions:
392/378 - 270/378 = 392 - 270/378 = 122/378
After reducing the fraction, the answer is 61/189

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