Subtract 9/81 from 5/49
5/49 - 9/81 is -4/441.
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,
5/49 = 5 × 81/49 × 81 = 405/3969 - Likewise, for the 2nd fraction, since 81 × 49 = 3969,
9/81 = 9 × 49/81 × 49 = 441/3969 - Subtract the two like fractions:
405/3969 - 441/3969 = 405 - 441/3969 = -36/3969 - After reducing the fraction, the answer is -4/441
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/49-9/81 5/49-18/81 5/98-9/81 15/49-9/81 5/49-27/81 25/49-9/81 5/49-45/81 35/49-9/81 5/49-63/81