Subtract 21/5 from 20/27
1st number: 20/27, 2nd number: 4 1/5
20/27 - 21/5 is -467/135.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 5 is 135
Next, find the equivalent fraction of both fractional numbers with denominator 135 - For the 1st fraction, since 27 × 5 = 135,
20/27 = 20 × 5/27 × 5 = 100/135 - Likewise, for the 2nd fraction, since 5 × 27 = 135,
21/5 = 21 × 27/5 × 27 = 567/135 - Subtract the two like fractions:
100/135 - 567/135 = 100 - 567/135 = -467/135
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