Subtract 8/81 from 28/7
1st number: 4 0/7, 2nd number: 8/81
28/7 - 8/81 is 316/81.
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,
8/81 = 8 × 7/81 × 7 = 56/567 - Subtract the two like fractions:
2268/567 - 56/567 = 2268 - 56/567 = 2212/567 - After reducing the fraction, the answer is 316/81
- In mixed form: 373/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/7-8/81 28/7-16/81 28/14-8/81 84/7-8/81 28/7-24/81 28/21-8/81 28/7-40/81 28/35-8/81 28/7-56/81 28/49-8/81