Subtract 3/64 from 21/27, Solve 21/27

Subtract 3/64 from 21/27

21/27 - 3/64 is 421/576.

Find the least common denominator or LCM of the two denominators:
LCM of 27 and 64 is 1728

Next, find the equivalent fraction of both fractional numbers with denominator 1728
For the 1st fraction, since 27 × 64 = 1728,
21/27 = 21 × 64/27 × 64 = 1344/1728
Likewise, for the 2nd fraction, since 64 × 27 = 1728,
3/64 = 3 × 27/64 × 27 = 81/1728
Subtract the two like fractions:
1344/1728 - 81/1728 = 1344 - 81/1728 = 1263/1728
After reducing the fraction, the answer is 421/576

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