Subtract 2/81 from 7/24
7/24 - 2/81 is 173/648.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 81 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 24 × 27 = 648,
7/24 = 7 × 27/24 × 27 = 189/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
2/81 = 2 × 8/81 × 8 = 16/648 - Subtract the two like fractions:
189/648 - 16/648 = 189 - 16/648 = 173/648
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/24-2/81 7/24-4/81 7/48-2/81 21/24-2/81 7/24-6/81 7/72-2/81 35/24-2/81 7/24-10/81 49/24-2/81 7/24-14/81