Subtract 90/70 from 8/7
1st number: 1 1/7, 2nd number: 1 20/70
8/7 - 90/70 is -1/7.
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,
8/7 = 8 × 10/7 × 10 = 80/70 - Likewise, for the 2nd fraction, since 70 × 1 = 70,
90/70 = 90 × 1/70 × 1 = 90/70 - Subtract the two like fractions:
80/70 - 90/70 = 80 - 90/70 = -10/70 - After reducing the fraction, the answer is -1/7
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