Subtract 15/80 from 5/4
1st number: 1 1/4, 2nd number: 15/80
5/4 - 15/80 is 17/16.
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,
5/4 = 5 × 20/4 × 20 = 100/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
15/80 = 15 × 1/80 × 1 = 15/80 - Subtract the two like fractions:
100/80 - 15/80 = 100 - 15/80 = 85/80 - After reducing the fraction, the answer is 17/16
- In mixed form: 11/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/4-15/80 5/4-30/80 5/8-15/80 15/4-15/80 5/4-45/80 5/12-15/80 25/4-15/80 5/4-75/80 5/20-15/80 35/4-15/80 5/28-15/80