Subtract 70/81 from 56/70
56/70 - 70/81 is -26/405.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 81 is 5670
Next, find the equivalent fraction of both fractional numbers with denominator 5670 - For the 1st fraction, since 70 × 81 = 5670,
56/70 = 56 × 81/70 × 81 = 4536/5670 - Likewise, for the 2nd fraction, since 81 × 70 = 5670,
70/81 = 70 × 70/81 × 70 = 4900/5670 - Subtract the two like fractions:
4536/5670 - 4900/5670 = 4536 - 4900/5670 = -364/5670 - After reducing the fraction, the answer is -26/405
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