Subtract 70/20 from 81/7
1st number: 11 4/7, 2nd number: 3 10/20
81/7 - 70/20 is 113/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
81/7 = 81 × 20/7 × 20 = 1620/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
70/20 = 70 × 7/20 × 7 = 490/140 - Subtract the two like fractions:
1620/140 - 490/140 = 1620 - 490/140 = 1130/140 - After reducing the fraction, the answer is 113/14
- In mixed form: 81/14
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