Subtract 20/21 from 25/32
25/32 - 20/21 is -115/672.
Steps for subtracting fractions
- 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,
25/32 = 25 × 21/32 × 21 = 525/672 - Likewise, for the 2nd fraction, since 21 × 32 = 672,
20/21 = 20 × 32/21 × 32 = 640/672 - Subtract the two like fractions:
525/672 - 640/672 = 525 - 640/672 = -115/672
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