Subtract 54/27 from 48/42, Solve 1 6/42

Subtract 54/27 from 48/42

1^st number: 1 6/42, 2^nd number: 2 0/27

48/42 - 54/27 is -6/7.

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

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 42 × 9 = 378,
48/42 = 48 × 9/42 × 9 = 432/378
Likewise, for the 2nd fraction, since 27 × 14 = 378,
54/27 = 54 × 14/27 × 14 = 756/378
Subtract the two like fractions:
432/378 - 756/378 = 432 - 756/378 = -324/378
After reducing the fraction, the answer is -6/7

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