Subtract 18/24 from 5/81
5/81 - 18/24 is -223/324.
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,
5/81 = 5 × 8/81 × 8 = 40/648 - Likewise, for the 2nd fraction, since 24 × 27 = 648,
18/24 = 18 × 27/24 × 27 = 486/648 - Subtract the two like fractions:
40/648 - 486/648 = 40 - 486/648 = -446/648 - After reducing the fraction, the answer is -223/324
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/81-18/24 5/81-36/24 5/81-18/48 15/81-18/24 5/81-54/24 5/81-18/72 25/81-18/24 5/81-90/24 35/81-18/24