Subtract 98/81 from 90/80
1st number: 1 10/80, 2nd number: 1 17/81
90/80 - 98/81 is -55/648.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 81 is 6480
Next, find the equivalent fraction of both fractional numbers with denominator 6480 - For the 1st fraction, since 80 × 81 = 6480,
90/80 = 90 × 81/80 × 81 = 7290/6480 - Likewise, for the 2nd fraction, since 81 × 80 = 6480,
98/81 = 98 × 80/81 × 80 = 7840/6480 - Subtract the two like fractions:
7290/6480 - 7840/6480 = 7290 - 7840/6480 = -550/6480 - After reducing the fraction, the answer is -55/648
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