Subtract 21/81 from 56/30
1st number: 1 26/30, 2nd number: 21/81
56/30 - 21/81 is 217/135.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 81 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 30 × 27 = 810,
56/30 = 56 × 27/30 × 27 = 1512/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
21/81 = 21 × 10/81 × 10 = 210/810 - Subtract the two like fractions:
1512/810 - 210/810 = 1512 - 210/810 = 1302/810 - After reducing the fraction, the answer is 217/135
- In mixed form: 182/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/30-42/81 56/60-21/81 56/30-63/81 56/90-21/81