Subtract 15/40 from 20/60
20/60 - 15/40 is -1/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 60 × 2 = 120,
20/60 = 20 × 2/60 × 2 = 40/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
15/40 = 15 × 3/40 × 3 = 45/120 - Subtract the two like fractions:
40/120 - 45/120 = 40 - 45/120 = -5/120 - After reducing the fraction, the answer is -1/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/60-15/40 20/60-30/40 20/60-15/80 20/60-45/40 20/60-75/40