Subtract 70/20 from 36/81
1st number: 36/81, 2nd number: 3 10/20
36/81 - 70/20 is -55/18.
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,
36/81 = 36 × 20/81 × 20 = 720/1620 - Likewise, for the 2nd fraction, since 20 × 81 = 1620,
70/20 = 70 × 81/20 × 81 = 5670/1620 - Subtract the two like fractions:
720/1620 - 5670/1620 = 720 - 5670/1620 = -4950/1620 - After reducing the fraction, the answer is -55/18
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