Subtract 9/8 from 15/5
1st number: 3 0/5, 2nd number: 1 1/8
15/5 - 9/8 is 15/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 5 × 8 = 40,
15/5 = 15 × 8/5 × 8 = 120/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
9/8 = 9 × 5/8 × 5 = 45/40 - Subtract the two like fractions:
120/40 - 45/40 = 120 - 45/40 = 75/40 - After reducing the fraction, the answer is 15/8
- In mixed form: 17/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/5-9/8 15/5-18/8 15/10-9/8 15/5-9/16 45/5-9/8 15/5-27/8 15/5-9/24 75/5-9/8 15/5-45/8 15/25-9/8 15/5-9/40 15/5-63/8 15/35-9/8 15/5-9/56