Subtract 1/81 from 9/49
9/49 - 1/81 is 680/3969.
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,
9/49 = 9 × 81/49 × 81 = 729/3969 - Likewise, for the 2nd fraction, since 81 × 49 = 3969,
1/81 = 1 × 49/81 × 49 = 49/3969 - Subtract the two like fractions:
729/3969 - 49/3969 = 729 - 49/3969 = 680/3969
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/49-1/81 9/49-2/81 9/98-1/81 27/49-1/81 9/49-3/81 45/49-1/81 9/49-5/81 63/49-1/81 9/49-7/81