Subtract 81/6 from 18/90
1st number: 18/90, 2nd number: 13 3/6
18/90 - 81/6 is -133/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 6 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
18/90 = 18 × 1/90 × 1 = 18/90 - Likewise, for the 2nd fraction, since 6 × 15 = 90,
81/6 = 81 × 15/6 × 15 = 1215/90 - Subtract the two like fractions:
18/90 - 1215/90 = 18 - 1215/90 = -1197/90 - After reducing the fraction, the answer is -133/10
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