Subtract 84/81 from 42/7
1st number: 6 0/7, 2nd number: 1 3/81
42/7 - 84/81 is 134/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 7 × 81 = 567,
42/7 = 42 × 81/7 × 81 = 3402/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
84/81 = 84 × 7/81 × 7 = 588/567 - Subtract the two like fractions:
3402/567 - 588/567 = 3402 - 588/567 = 2814/567 - After reducing the fraction, the answer is 134/27
- In mixed form: 426/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/7-84/81 42/14-84/81 42/21-84/81 42/35-84/81 42/49-84/81