Subtract 21/32 from 63/42, Solve 1 21/42

Subtract 21/32 from 63/42

1^st number: 1 21/42, 2^nd number: 21/32

63/42 - 21/32 is 27/32.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 32 is 672

Next, find the equivalent fraction of both fractional numbers with denominator 672
For the 1st fraction, since 42 × 16 = 672,
63/42 = 63 × 16/42 × 16 = 1008/672
Likewise, for the 2nd fraction, since 32 × 21 = 672,
21/32 = 21 × 21/32 × 21 = 441/672
Subtract the two like fractions:
1008/672 - 441/672 = 1008 - 441/672 = 567/672
After reducing the fraction, the answer is 27/32

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