Subtract 70/81 from 10/27
10/27 - 70/81 is -40/81.
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,
10/27 = 10 × 3/27 × 3 = 30/81 - Likewise, for the 2nd fraction, since 81 × 1 = 81,
70/81 = 70 × 1/81 × 1 = 70/81 - Subtract the two like fractions:
30/81 - 70/81 = 30 - 70/81 = -40/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/27-70/81 10/54-70/81 30/27-70/81 10/81-70/81 50/27-70/81 70/27-70/81