Subtract 2/81 from 7/27
7/27 - 2/81 is 19/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 81 is 81
Next, find the equivalent fraction of both fractional numbers with denominator 81 - For the 1st fraction, since 27 × 3 = 81,
7/27 = 7 × 3/27 × 3 = 21/81 - Likewise, for the 2nd fraction, since 81 × 1 = 81,
2/81 = 2 × 1/81 × 1 = 2/81 - Subtract the two like fractions:
21/81 - 2/81 = 21 - 2/81 = 19/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/27-2/81 7/27-4/81 7/54-2/81 21/27-2/81 7/27-6/81 7/81-2/81 35/27-2/81 7/27-10/81 49/27-2/81 7/27-14/81