Subtract 4/20 from 80/18
1st number: 4 8/18, 2nd number: 4/20
80/18 - 4/20 is 191/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 18 × 10 = 180,
80/18 = 80 × 10/18 × 10 = 800/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
4/20 = 4 × 9/20 × 9 = 36/180 - Subtract the two like fractions:
800/180 - 36/180 = 800 - 36/180 = 764/180 - After reducing the fraction, the answer is 191/45
- In mixed form: 411/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/18-8/20 80/36-4/20 80/18-4/40 80/18-12/20 80/54-4/20 80/18-4/60 80/90-4/20 80/18-28/20