Subtract 90/27 from 81/45
1st number: 1 36/45, 2nd number: 3 9/27
81/45 - 90/27 is -23/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 27 is 135
Next, find the equivalent fraction of both fractional numbers with denominator 135 - For the 1st fraction, since 45 × 3 = 135,
81/45 = 81 × 3/45 × 3 = 243/135 - Likewise, for the 2nd fraction, since 27 × 5 = 135,
90/27 = 90 × 5/27 × 5 = 450/135 - Subtract the two like fractions:
243/135 - 450/135 = 243 - 450/135 = -207/135 - After reducing the fraction, the answer is -23/15
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