Subtract 2/81 from 27/8
1st number: 3 3/8, 2nd number: 2/81
27/8 - 2/81 is 2171/648.
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,
2/81 = 2 × 8/81 × 8 = 16/648 - Subtract the two like fractions:
2187/648 - 16/648 = 2187 - 16/648 = 2171/648 - In mixed form: 3227/648
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/8-2/81 27/8-4/81 27/16-2/81 81/8-2/81 27/8-6/81 27/24-2/81 27/8-10/81 27/40-2/81 27/8-14/81 27/56-2/81