Subtract 18/5 from 20/4
1st number: 5 0/4, 2nd number: 3 3/5
20/4 - 18/5 is 7/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 5 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
20/4 = 20 × 5/4 × 5 = 100/20 - Likewise, for the 2nd fraction, since 5 × 4 = 20,
18/5 = 18 × 4/5 × 4 = 72/20 - Subtract the two like fractions:
100/20 - 72/20 = 100 - 72/20 = 28/20 - After reducing the fraction, the answer is 7/5
- In mixed form: 12/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/4-18/5 20/4-36/5 20/8-18/5 20/4-18/10 60/4-18/5 20/4-54/5 20/12-18/5 20/4-18/15 20/4-90/5 20/4-18/25 20/28-18/5 20/4-18/35