Subtract 90/27 from 40/15
1st number: 2 10/15, 2nd number: 3 9/27
40/15 - 90/27 is -2/3.
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,
40/15 = 40 × 9/15 × 9 = 360/135 - Likewise, for the 2nd fraction, since 27 × 5 = 135,
90/27 = 90 × 5/27 × 5 = 450/135 - Subtract the two like fractions:
360/135 - 450/135 = 360 - 450/135 = -90/135 - After reducing the fraction, the answer is -2/3
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