Subtract 81/35 from 15/42
1st number: 15/42, 2nd number: 2 11/35
15/42 - 81/35 is -137/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 35 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
15/42 = 15 × 5/42 × 5 = 75/210 - Likewise, for the 2nd fraction, since 35 × 6 = 210,
81/35 = 81 × 6/35 × 6 = 486/210 - Subtract the two like fractions:
75/210 - 486/210 = 75 - 486/210 = -411/210 - After reducing the fraction, the answer is -137/70
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