Subtract 20/15 from 21/75
1st number: 21/75, 2nd number: 1 5/15
21/75 - 20/15 is -79/75.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 15 is 75
Next, find the equivalent fraction of both fractional numbers with denominator 75 - For the 1st fraction, since 75 × 1 = 75,
21/75 = 21 × 1/75 × 1 = 21/75 - Likewise, for the 2nd fraction, since 15 × 5 = 75,
20/15 = 20 × 5/15 × 5 = 100/75 - Subtract the two like fractions:
21/75 - 100/75 = 21 - 100/75 = -79/75
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