Subtract 7/81 from 27/8
1st number: 3 3/8, 2nd number: 7/81
27/8 - 7/81 is 2131/648.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 81 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 8 × 81 = 648,
27/8 = 27 × 81/8 × 81 = 2187/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
7/81 = 7 × 8/81 × 8 = 56/648 - Subtract the two like fractions:
2187/648 - 56/648 = 2187 - 56/648 = 2131/648 - In mixed form: 3187/648
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/8-7/81 27/8-14/81 27/16-7/81 81/8-7/81 27/8-21/81 27/24-7/81 27/8-35/81 27/40-7/81 27/8-49/81 27/56-7/81