Subtract 10/81 from 3/49
3/49 - 10/81 is -247/3969.
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,
3/49 = 3 × 81/49 × 81 = 243/3969 - Likewise, for the 2nd fraction, since 81 × 49 = 3969,
10/81 = 10 × 49/81 × 49 = 490/3969 - Subtract the two like fractions:
243/3969 - 490/3969 = 243 - 490/3969 = -247/3969
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/49-10/81 3/49-20/81 3/98-10/81 9/49-10/81 3/49-30/81 15/49-10/81 3/49-50/81 21/49-10/81 3/49-70/81