Subtract 81/42 from 20/35
1st number: 20/35, 2nd number: 1 39/42
20/35 - 81/42 is -19/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 35 × 6 = 210,
20/35 = 20 × 6/35 × 6 = 120/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
81/42 = 81 × 5/42 × 5 = 405/210 - Subtract the two like fractions:
120/210 - 405/210 = 120 - 405/210 = -285/210 - After reducing the fraction, the answer is -19/14
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