Subtract 25/81 from 12/24
12/24 - 25/81 is 31/162.
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,
12/24 = 12 × 27/24 × 27 = 324/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
25/81 = 25 × 8/81 × 8 = 200/648 - Subtract the two like fractions:
324/648 - 200/648 = 324 - 200/648 = 124/648 - After reducing the fraction, the answer is 31/162
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/24-50/81 12/48-25/81 36/24-25/81 12/24-75/81 12/72-25/81 60/24-25/81 84/24-25/81