Subtract 20/32 from 3/21
3/21 - 20/32 is -27/56.
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,
3/21 = 3 × 32/21 × 32 = 96/672 - Likewise, for the 2nd fraction, since 32 × 21 = 672,
20/32 = 20 × 21/32 × 21 = 420/672 - Subtract the two like fractions:
96/672 - 420/672 = 96 - 420/672 = -324/672 - After reducing the fraction, the answer is -27/56
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