Subtract 12/32 from 4/21
4/21 - 12/32 is -31/168.
Steps for subtracting fractions
- 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,
4/21 = 4 × 32/21 × 32 = 128/672 - Likewise, for the 2nd fraction, since 32 × 21 = 672,
12/32 = 12 × 21/32 × 21 = 252/672 - Subtract the two like fractions:
128/672 - 252/672 = 128 - 252/672 = -124/672 - After reducing the fraction, the answer is -31/168
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