Subtract 20/25 from 21/36
21/36 - 20/25 is -13/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 25 is 900
Next, find the equivalent fraction of both fractional numbers with denominator 900 - For the 1st fraction, since 36 × 25 = 900,
21/36 = 21 × 25/36 × 25 = 525/900 - Likewise, for the 2nd fraction, since 25 × 36 = 900,
20/25 = 20 × 36/25 × 36 = 720/900 - Subtract the two like fractions:
525/900 - 720/900 = 525 - 720/900 = -195/900 - After reducing the fraction, the answer is -13/60
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