Subtract 42/32 from 5/21, Solve 5/21

Subtract 42/32 from 5/21

1^st number: 5/21, 2^nd number: 1 10/32

5/21 - 42/32 is -361/336.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 32 is 672

Next, find the equivalent fraction of both fractional numbers with denominator 672
For the 1st fraction, since 21 × 32 = 672,
5/21 = 5 × 32/21 × 32 = 160/672
Likewise, for the 2nd fraction, since 32 × 21 = 672,
42/32 = 42 × 21/32 × 21 = 882/672
Subtract the two like fractions:
160/672 - 882/672 = 160 - 882/672 = -722/672
After reducing the fraction, the answer is -361/336

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