Subtract 5/81 from 12/49
12/49 - 5/81 is 727/3969.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 81 is 3969
Next, find the equivalent fraction of both fractional numbers with denominator 3969 - For the 1st fraction, since 49 × 81 = 3969,
12/49 = 12 × 81/49 × 81 = 972/3969 - Likewise, for the 2nd fraction, since 81 × 49 = 3969,
5/81 = 5 × 49/81 × 49 = 245/3969 - Subtract the two like fractions:
972/3969 - 245/3969 = 972 - 245/3969 = 727/3969
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/49-5/81 12/49-10/81 12/98-5/81 36/49-5/81 12/49-15/81 60/49-5/81 12/49-25/81 84/49-5/81 12/49-35/81