Subtract 90/27 from 42/15
1st number: 2 12/15, 2nd number: 3 9/27
42/15 - 90/27 is -8/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 27 is 135
Next, find the equivalent fraction of both fractional numbers with denominator 135 - For the 1st fraction, since 15 × 9 = 135,
42/15 = 42 × 9/15 × 9 = 378/135 - Likewise, for the 2nd fraction, since 27 × 5 = 135,
90/27 = 90 × 5/27 × 5 = 450/135 - Subtract the two like fractions:
378/135 - 450/135 = 378 - 450/135 = -72/135 - After reducing the fraction, the answer is -8/15
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