Subtract 80/28 from 90/81
1st number: 1 9/81, 2nd number: 2 24/28
90/81 - 80/28 is -110/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 28 is 2268
Next, find the equivalent fraction of both fractional numbers with denominator 2268 - For the 1st fraction, since 81 × 28 = 2268,
90/81 = 90 × 28/81 × 28 = 2520/2268 - Likewise, for the 2nd fraction, since 28 × 81 = 2268,
80/28 = 80 × 81/28 × 81 = 6480/2268 - Subtract the two like fractions:
2520/2268 - 6480/2268 = 2520 - 6480/2268 = -3960/2268 - After reducing the fraction, the answer is -110/63
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