Subtract 21/27 from 20/15
1st number: 1 5/15, 2nd number: 21/27
20/15 - 21/27 is 5/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 27 is 135
Next, find the equivalent fraction of both fractional numbers with denominator 135 - For the 1st fraction, since 15 × 9 = 135,
20/15 = 20 × 9/15 × 9 = 180/135 - Likewise, for the 2nd fraction, since 27 × 5 = 135,
21/27 = 21 × 5/27 × 5 = 105/135 - Subtract the two like fractions:
180/135 - 105/135 = 180 - 105/135 = 75/135 - After reducing the fraction, the answer is 5/9
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