Subtract 3/20 from 15/81
15/81 - 3/20 is 19/540.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 20 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 81 × 20 = 1620,
15/81 = 15 × 20/81 × 20 = 300/1620 - Likewise, for the 2nd fraction, since 20 × 81 = 1620,
3/20 = 3 × 81/20 × 81 = 243/1620 - Subtract the two like fractions:
300/1620 - 243/1620 = 300 - 243/1620 = 57/1620 - After reducing the fraction, the answer is 19/540
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