Subtract 21/5 from 10/64, Solve 10/64

Subtract 21/5 from 10/64

1^st number: 10/64, 2^nd number: 4 1/5

10/64 - 21/5 is -647/160.

Find the least common denominator or LCM of the two denominators:
LCM of 64 and 5 is 320

Next, find the equivalent fraction of both fractional numbers with denominator 320
For the 1st fraction, since 64 × 5 = 320,
10/64 = 10 × 5/64 × 5 = 50/320
Likewise, for the 2nd fraction, since 5 × 64 = 320,
21/5 = 21 × 64/5 × 64 = 1344/320
Subtract the two like fractions:
50/320 - 1344/320 = 50 - 1344/320 = -1294/320
After reducing the fraction, the answer is -647/160

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