Subtract 27/64 from 15/42, Solve 15/42

Subtract 27/64 from 15/42

15/42 - 27/64 is -29/448.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 64 is 1344

Next, find the equivalent fraction of both fractional numbers with denominator 1344
For the 1st fraction, since 42 × 32 = 1344,
15/42 = 15 × 32/42 × 32 = 480/1344
Likewise, for the 2nd fraction, since 64 × 21 = 1344,
27/64 = 27 × 21/64 × 21 = 567/1344
Subtract the two like fractions:
480/1344 - 567/1344 = 480 - 567/1344 = -87/1344
After reducing the fraction, the answer is -29/448

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