Subtract 18/20 from 20/60
20/60 - 18/20 is -17/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 60 × 1 = 60,
20/60 = 20 × 1/60 × 1 = 20/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
18/20 = 18 × 3/20 × 3 = 54/60 - Subtract the two like fractions:
20/60 - 54/60 = 20 - 54/60 = -34/60 - After reducing the fraction, the answer is -17/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/60-18/20 20/60-36/20 20/60-18/40 20/60-54/20 20/60-18/60 20/60-90/20