Subtract 5/4 from 80/18
1st number: 4 8/18, 2nd number: 1 1/4
80/18 - 5/4 is 115/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 4 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 18 × 2 = 36,
80/18 = 80 × 2/18 × 2 = 160/36 - Likewise, for the 2nd fraction, since 4 × 9 = 36,
5/4 = 5 × 9/4 × 9 = 45/36 - Subtract the two like fractions:
160/36 - 45/36 = 160 - 45/36 = 115/36 - In mixed form: 37/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/18-10/4 80/36-5/4 80/18-5/8 80/18-15/4 80/54-5/4 80/18-5/12 80/18-25/4 80/90-5/4 80/18-5/20 80/18-35/4 80/18-5/28