Subtract 15/20 from 25/8
1st number: 3 1/8, 2nd number: 15/20
25/8 - 15/20 is 19/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 20 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
25/8 = 25 × 5/8 × 5 = 125/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
15/20 = 15 × 2/20 × 2 = 30/40 - Subtract the two like fractions:
125/40 - 30/40 = 125 - 30/40 = 95/40 - After reducing the fraction, the answer is 19/8
- In mixed form: 23/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/8-15/20 25/8-30/20 25/16-15/20 25/8-15/40 75/8-15/20 25/8-45/20 25/24-15/20 25/8-15/60 25/8-75/20 25/40-15/20 25/56-15/20