Subtract 20/70 from 5/81
5/81 - 20/70 is -127/567.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 70 is 5670
Next, find the equivalent fraction of both fractional numbers with denominator 5670 - For the 1st fraction, since 81 × 70 = 5670,
5/81 = 5 × 70/81 × 70 = 350/5670 - Likewise, for the 2nd fraction, since 70 × 81 = 5670,
20/70 = 20 × 81/70 × 81 = 1620/5670 - Subtract the two like fractions:
350/5670 - 1620/5670 = 350 - 1620/5670 = -1270/5670 - After reducing the fraction, the answer is -127/567
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