Subtract 8/20 from 72/81
72/81 - 8/20 is 22/45.
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,
72/81 = 72 × 20/81 × 20 = 1440/1620 - Likewise, for the 2nd fraction, since 20 × 81 = 1620,
8/20 = 8 × 81/20 × 81 = 648/1620 - Subtract the two like fractions:
1440/1620 - 648/1620 = 1440 - 648/1620 = 792/1620 - After reducing the fraction, the answer is 22/45
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