Subtract 90/20 from 18/2
1st number: 9 0/2, 2nd number: 4 10/20
18/2 - 90/20 is 9/2.
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,
90/20 = 90 × 1/20 × 1 = 90/20 - Subtract the two like fractions:
180/20 - 90/20 = 180 - 90/20 = 90/20 - After reducing the fraction, the answer is 9/2
- In mixed form: 41/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/2-90/20 18/4-90/20 18/2-90/40 54/2-90/20 18/6-90/20 18/2-90/60 90/2-90/20 18/10-90/20 18/14-90/20