Subtract 10/27 from 70/81
70/81 - 10/27 is 40/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 27 is 81
Next, find the equivalent fraction of both fractional numbers with denominator 81 - For the 1st fraction, since 81 × 1 = 81,
70/81 = 70 × 1/81 × 1 = 70/81 - Likewise, for the 2nd fraction, since 27 × 3 = 81,
10/27 = 10 × 3/27 × 3 = 30/81 - Subtract the two like fractions:
70/81 - 30/81 = 70 - 30/81 = 40/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/81-20/27 70/81-10/54 70/81-30/27 70/81-10/81 70/81-50/27 70/81-70/27