Subtract 2/81 from 3/7
3/7 - 2/81 is 229/567.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 7 × 81 = 567,
3/7 = 3 × 81/7 × 81 = 243/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
2/81 = 2 × 7/81 × 7 = 14/567 - Subtract the two like fractions:
243/567 - 14/567 = 243 - 14/567 = 229/567
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/7-2/81 3/7-4/81 3/14-2/81 9/7-2/81 3/7-6/81 3/21-2/81 15/7-2/81 3/7-10/81 3/35-2/81 21/7-2/81 3/7-14/81 3/49-2/81