Subtract 42/18 from 42/15
1st number: 2 12/15, 2nd number: 2 6/18
42/15 - 42/18 is 7/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
42/15 = 42 × 6/15 × 6 = 252/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
42/18 = 42 × 5/18 × 5 = 210/90 - Subtract the two like fractions:
252/90 - 210/90 = 252 - 210/90 = 42/90 - After reducing the fraction, the answer is 7/15
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