Subtract 15/20 from 20/25
20/25 - 15/20 is 1/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 20 is 100
Next, find the equivalent fraction of both fractional numbers with denominator 100 - For the 1st fraction, since 25 × 4 = 100,
20/25 = 20 × 4/25 × 4 = 80/100 - Likewise, for the 2nd fraction, since 20 × 5 = 100,
15/20 = 15 × 5/20 × 5 = 75/100 - Subtract the two like fractions:
80/100 - 75/100 = 80 - 75/100 = 5/100 - After reducing the fraction, the answer is 1/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/25-15/20 20/25-30/20 20/50-15/20 20/25-15/40 60/25-15/20 20/25-45/20 20/75-15/20 20/25-15/60 20/25-75/20