Subtract 1/3 from 4/20
4/20 - 1/3 is -2/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 3 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
4/20 = 4 × 3/20 × 3 = 12/60 - Likewise, for the 2nd fraction, since 3 × 20 = 60,
1/3 = 1 × 20/3 × 20 = 20/60 - Subtract the two like fractions:
12/60 - 20/60 = 12 - 20/60 = -8/60 - After reducing the fraction, the answer is -2/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/20-1/3 4/20-2/3 4/40-1/3 4/20-1/6 12/20-1/3 4/60-1/3 4/20-1/9 4/20-5/3 4/20-1/15 28/20-1/3 4/20-7/3 4/20-1/21