Subtract 98/81 from 28/10
1st number: 2 8/10, 2nd number: 1 17/81
28/10 - 98/81 is 644/405.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 81 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 10 × 81 = 810,
28/10 = 28 × 81/10 × 81 = 2268/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
98/81 = 98 × 10/81 × 10 = 980/810 - Subtract the two like fractions:
2268/810 - 980/810 = 2268 - 980/810 = 1288/810 - After reducing the fraction, the answer is 644/405
- In mixed form: 1239/405
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/10-98/81 28/20-98/81 84/10-98/81 28/30-98/81 28/50-98/81 28/70-98/81