Subtract 35/70 from 3/81
3/81 - 35/70 is -25/54.
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,
3/81 = 3 × 70/81 × 70 = 210/5670 - Likewise, for the 2nd fraction, since 70 × 81 = 5670,
35/70 = 35 × 81/70 × 81 = 2835/5670 - Subtract the two like fractions:
210/5670 - 2835/5670 = 210 - 2835/5670 = -2625/5670 - After reducing the fraction, the answer is -25/54
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