Subtract 81/9 from 5/2
1st number: 2 1/2, 2nd number: 9 0/9
5/2 - 81/9 is -13/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 9 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 2 × 9 = 18,
5/2 = 5 × 9/2 × 9 = 45/18 - Likewise, for the 2nd fraction, since 9 × 2 = 18,
81/9 = 81 × 2/9 × 2 = 162/18 - Subtract the two like fractions:
45/18 - 162/18 = 45 - 162/18 = -117/18 - After reducing the fraction, the answer is -13/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/2-81/9 5/4-81/9 5/2-81/18 15/2-81/9 5/6-81/9 5/2-81/27 25/2-81/9 5/10-81/9 5/2-81/45 35/2-81/9 5/14-81/9 5/2-81/63