Subtract 5/18 from 81/2
1st number: 40 1/2, 2nd number: 5/18
81/2 - 5/18 is 362/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 18 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 2 × 9 = 18,
81/2 = 81 × 9/2 × 9 = 729/18 - Likewise, for the 2nd fraction, since 18 × 1 = 18,
5/18 = 5 × 1/18 × 1 = 5/18 - Subtract the two like fractions:
729/18 - 5/18 = 729 - 5/18 = 724/18 - After reducing the fraction, the answer is 362/9
- In mixed form: 402/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/2-10/18 81/4-5/18 81/2-5/36 81/2-15/18 81/6-5/18 81/2-5/54 81/2-25/18 81/10-5/18 81/2-5/90 81/2-35/18 81/14-5/18