Subtract 60/63 from 42/54, Solve 42/54

Subtract 60/63 from 42/54

42/54 - 60/63 is -11/63.

Find the least common denominator or LCM of the two denominators:
LCM of 54 and 63 is 378

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 54 × 7 = 378,
42/54 = 42 × 7/54 × 7 = 294/378
Likewise, for the 2nd fraction, since 63 × 6 = 378,
60/63 = 60 × 6/63 × 6 = 360/378
Subtract the two like fractions:
294/378 - 360/378 = 294 - 360/378 = -66/378
After reducing the fraction, the answer is -11/63

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