Subtract 20/25 from 4/20
4/20 - 20/25 is -3/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 25 is 100
Next, find the equivalent fraction of both fractional numbers with denominator 100 - For the 1st fraction, since 20 × 5 = 100,
4/20 = 4 × 5/20 × 5 = 20/100 - Likewise, for the 2nd fraction, since 25 × 4 = 100,
20/25 = 20 × 4/25 × 4 = 80/100 - Subtract the two like fractions:
20/100 - 80/100 = 20 - 80/100 = -60/100 - After reducing the fraction, the answer is -3/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/20-20/25 4/20-40/25 4/40-20/25 4/20-20/50 12/20-20/25 4/20-60/25 4/60-20/25 4/20-20/75 28/20-20/25