Subtract 81/70 from 12/7
1st number: 1 5/7, 2nd number: 1 11/70
12/7 - 81/70 is 39/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 70 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 7 × 10 = 70,
12/7 = 12 × 10/7 × 10 = 120/70 - Likewise, for the 2nd fraction, since 70 × 1 = 70,
81/70 = 81 × 1/70 × 1 = 81/70 - Subtract the two like fractions:
120/70 - 81/70 = 120 - 81/70 = 39/70
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