Subtract 21/18 from 7/64, Solve 7/64

Subtract 21/18 from 7/64

1^st number: 7/64, 2^nd number: 1 3/18

7/64 - 21/18 is -203/192.

Find the least common denominator or LCM of the two denominators:
LCM of 64 and 18 is 576

Next, find the equivalent fraction of both fractional numbers with denominator 576
For the 1st fraction, since 64 × 9 = 576,
7/64 = 7 × 9/64 × 9 = 63/576
Likewise, for the 2nd fraction, since 18 × 32 = 576,
21/18 = 21 × 32/18 × 32 = 672/576
Subtract the two like fractions:
63/576 - 672/576 = 63 - 672/576 = -609/576
After reducing the fraction, the answer is -203/192

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