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