Subtract 15/81 from 56/28
1st number: 2 0/28, 2nd number: 15/81
56/28 - 15/81 is 49/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 81 is 2268
Next, find the equivalent fraction of both fractional numbers with denominator 2268 - For the 1st fraction, since 28 × 81 = 2268,
56/28 = 56 × 81/28 × 81 = 4536/2268 - Likewise, for the 2nd fraction, since 81 × 28 = 2268,
15/81 = 15 × 28/81 × 28 = 420/2268 - Subtract the two like fractions:
4536/2268 - 420/2268 = 4536 - 420/2268 = 4116/2268 - After reducing the fraction, the answer is 49/27
- In mixed form: 122/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/28-30/81 56/28-45/81 56/84-15/81 56/28-75/81