Subtract 28/81 from 28/7
1st number: 4 0/7, 2nd number: 28/81
28/7 - 28/81 is 296/81.
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,
28/7 = 28 × 81/7 × 81 = 2268/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
28/81 = 28 × 7/81 × 7 = 196/567 - Subtract the two like fractions:
2268/567 - 196/567 = 2268 - 196/567 = 2072/567 - After reducing the fraction, the answer is 296/81
- In mixed form: 353/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/7-28/81 28/7-56/81 28/14-28/81 84/7-28/81 28/7-84/81 28/21-28/81 28/35-28/81 28/49-28/81