Subtract 18/20 from 18/2
1st number: 9 0/2, 2nd number: 18/20
18/2 - 18/20 is 81/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 2 × 10 = 20,
18/2 = 18 × 10/2 × 10 = 180/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
18/20 = 18 × 1/20 × 1 = 18/20 - Subtract the two like fractions:
180/20 - 18/20 = 180 - 18/20 = 162/20 - After reducing the fraction, the answer is 81/10
- In mixed form: 81/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/2-18/20 18/2-36/20 18/4-18/20 18/2-18/40 54/2-18/20 18/2-54/20 18/6-18/20 18/2-18/60 90/2-18/20 18/2-90/20 18/10-18/20 18/14-18/20