Subtract 42/15 from 9/18
1st number: 9/18, 2nd number: 2 12/15
9/18 - 42/15 is -23/10.
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,
9/18 = 9 × 5/18 × 5 = 45/90 - Likewise, for the 2nd fraction, since 15 × 6 = 90,
42/15 = 42 × 6/15 × 6 = 252/90 - Subtract the two like fractions:
45/90 - 252/90 = 45 - 252/90 = -207/90 - After reducing the fraction, the answer is -23/10
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