Subtract 18/21 from 27/32, Solve 27/32

Subtract 18/21 from 27/32

27/32 - 18/21 is -3/224.

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

Next, find the equivalent fraction of both fractional numbers with denominator 672
For the 1st fraction, since 32 × 21 = 672,
27/32 = 27 × 21/32 × 21 = 567/672
Likewise, for the 2nd fraction, since 21 × 32 = 672,
18/21 = 18 × 32/21 × 32 = 576/672
Subtract the two like fractions:
567/672 - 576/672 = 567 - 576/672 = -9/672
After reducing the fraction, the answer is -3/224

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