Subtract 25/40 from 20/8
1st number: 2 4/8, 2nd number: 25/40
20/8 - 25/40 is 15/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
20/8 = 20 × 5/8 × 5 = 100/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
25/40 = 25 × 1/40 × 1 = 25/40 - Subtract the two like fractions:
100/40 - 25/40 = 100 - 25/40 = 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: 40/8-25/40 20/8-50/40 20/16-25/40 20/8-25/80 60/8-25/40 20/8-75/40 20/24-25/40 20/40-25/40 20/56-25/40