Subtract 10/81 from 27/20
1st number: 1 7/20, 2nd number: 10/81
27/20 - 10/81 is 1987/1620.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 81 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 20 × 81 = 1620,
27/20 = 27 × 81/20 × 81 = 2187/1620 - Likewise, for the 2nd fraction, since 81 × 20 = 1620,
10/81 = 10 × 20/81 × 20 = 200/1620 - Subtract the two like fractions:
2187/1620 - 200/1620 = 2187 - 200/1620 = 1987/1620 - In mixed form: 1367/1620
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