Subtract 20/5 from 18/2
1st number: 9 0/2, 2nd number: 4 0/5
18/2 - 20/5 is 5/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 5 is 10
Next, find the equivalent fraction of both fractional numbers with denominator 10 - For the 1st fraction, since 2 × 5 = 10,
18/2 = 18 × 5/2 × 5 = 90/10 - Likewise, for the 2nd fraction, since 5 × 2 = 10,
20/5 = 20 × 2/5 × 2 = 40/10 - Subtract the two like fractions:
90/10 - 40/10 = 90 - 40/10 = 50/10 - After reducing the fraction, the answer is 5/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/2-20/5 18/2-40/5 18/4-20/5 18/2-20/10 54/2-20/5 18/2-60/5 18/6-20/5 18/2-20/15 90/2-20/5 18/10-20/5 18/2-20/25 18/14-20/5 18/2-20/35