Subtract 80/42 from 18/15
1st number: 1 3/15, 2nd number: 1 38/42
18/15 - 80/42 is -74/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
18/15 = 18 × 14/15 × 14 = 252/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
80/42 = 80 × 5/42 × 5 = 400/210 - Subtract the two like fractions:
252/210 - 400/210 = 252 - 400/210 = -148/210 - After reducing the fraction, the answer is -74/105
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