Subtract 75/80 from 18/4
1st number: 4 2/4, 2nd number: 75/80
18/4 - 75/80 is 57/16.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 4 × 20 = 80,
18/4 = 18 × 20/4 × 20 = 360/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
75/80 = 75 × 1/80 × 1 = 75/80 - Subtract the two like fractions:
360/80 - 75/80 = 360 - 75/80 = 285/80 - After reducing the fraction, the answer is 57/16
- In mixed form: 39/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/4-75/80 18/8-75/80 54/4-75/80 18/12-75/80 90/4-75/80 18/20-75/80 18/28-75/80