Subtract 25/81 from 35/30
1st number: 1 5/30, 2nd number: 25/81
35/30 - 25/81 is 139/162.
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,
35/30 = 35 × 27/30 × 27 = 945/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
25/81 = 25 × 10/81 × 10 = 250/810 - Subtract the two like fractions:
945/810 - 250/810 = 945 - 250/810 = 695/810 - After reducing the fraction, the answer is 139/162
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/30-25/81 35/30-50/81 35/60-25/81 35/30-75/81 35/90-25/81