Subtract 90/10 from 80/70
1st number: 1 10/70, 2nd number: 9 0/10
80/70 - 90/10 is -55/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 10 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 70 × 1 = 70,
80/70 = 80 × 1/70 × 1 = 80/70 - Likewise, for the 2nd fraction, since 10 × 7 = 70,
90/10 = 90 × 7/10 × 7 = 630/70 - Subtract the two like fractions:
80/70 - 630/70 = 80 - 630/70 = -550/70 - After reducing the fraction, the answer is -55/7
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