Subtract 12/81 from 27/10
1st number: 2 7/10, 2nd number: 12/81
27/10 - 12/81 is 689/270.
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,
27/10 = 27 × 81/10 × 81 = 2187/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
12/81 = 12 × 10/81 × 10 = 120/810 - Subtract the two like fractions:
2187/810 - 120/810 = 2187 - 120/810 = 2067/810 - After reducing the fraction, the answer is 689/270
- In mixed form: 2149/270
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/10-12/81 27/10-24/81 27/20-12/81 81/10-12/81 27/10-36/81 27/30-12/81 27/10-60/81 27/50-12/81 27/10-84/81 27/70-12/81