Subtract 18/30 from 2/20
2/20 - 18/30 is -1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
2/20 = 2 × 3/20 × 3 = 6/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
18/30 = 18 × 2/30 × 2 = 36/60 - Subtract the two like fractions:
6/60 - 36/60 = 6 - 36/60 = -30/60 - After reducing the fraction, the answer is -1/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/20-18/30 2/20-36/30 2/40-18/30 2/20-18/60 6/20-18/30 2/20-54/30 2/60-18/30 2/20-18/90 10/20-18/30 2/20-90/30 14/20-18/30