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

Subtract 7/64 from 7/21

7/21 - 7/64 is 43/192.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 64 is 1344

Next, find the equivalent fraction of both fractional numbers with denominator 1344
For the 1st fraction, since 21 × 64 = 1344,
7/21 = 7 × 64/21 × 64 = 448/1344
Likewise, for the 2nd fraction, since 64 × 21 = 1344,
7/64 = 7 × 21/64 × 21 = 147/1344
Subtract the two like fractions:
448/1344 - 147/1344 = 448 - 147/1344 = 301/1344
After reducing the fraction, the answer is 43/192

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