Subtract 27/15 from 20/18
1st number: 1 2/18, 2nd number: 1 12/15
20/18 - 27/15 is -31/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 15 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
20/18 = 20 × 5/18 × 5 = 100/90 - Likewise, for the 2nd fraction, since 15 × 6 = 90,
27/15 = 27 × 6/15 × 6 = 162/90 - Subtract the two like fractions:
100/90 - 162/90 = 100 - 162/90 = -62/90 - After reducing the fraction, the answer is -31/45
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