Subtract 20/25 from 21/63
21/63 - 20/25 is -7/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 25 is 1575
Next, find the equivalent fraction of both fractional numbers with denominator 1575 - For the 1st fraction, since 63 × 25 = 1575,
21/63 = 21 × 25/63 × 25 = 525/1575 - Likewise, for the 2nd fraction, since 25 × 63 = 1575,
20/25 = 20 × 63/25 × 63 = 1260/1575 - Subtract the two like fractions:
525/1575 - 1260/1575 = 525 - 1260/1575 = -735/1575 - After reducing the fraction, the answer is -7/15
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