Subtract 81/7 from 2/42
1st number: 2/42, 2nd number: 11 4/7
2/42 - 81/7 is -242/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 7 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
2/42 = 2 × 1/42 × 1 = 2/42 - Likewise, for the 2nd fraction, since 7 × 6 = 42,
81/7 = 81 × 6/7 × 6 = 486/42 - Subtract the two like fractions:
2/42 - 486/42 = 2 - 486/42 = -484/42 - After reducing the fraction, the answer is -242/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/42-81/7 2/84-81/7 2/42-81/14 6/42-81/7 2/42-81/21 10/42-81/7 2/42-81/35 14/42-81/7 2/42-81/49