Subtract 21/7 from 5/64, Solve 5/64

Subtract 21/7 from 5/64

1^st number: 5/64, 2^nd number: 3 0/7

5/64 - 21/7 is -187/64.

Find the least common denominator or LCM of the two denominators:
LCM of 64 and 7 is 448

Next, find the equivalent fraction of both fractional numbers with denominator 448
For the 1st fraction, since 64 × 7 = 448,
5/64 = 5 × 7/64 × 7 = 35/448
Likewise, for the 2nd fraction, since 7 × 64 = 448,
21/7 = 21 × 64/7 × 64 = 1344/448
Subtract the two like fractions:
35/448 - 1344/448 = 35 - 1344/448 = -1309/448
After reducing the fraction, the answer is -187/64

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