Subtract 20/30 from 8/20
8/20 - 20/30 is -4/15.
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,
8/20 = 8 × 3/20 × 3 = 24/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
20/30 = 20 × 2/30 × 2 = 40/60 - Subtract the two like fractions:
24/60 - 40/60 = 24 - 40/60 = -16/60 - After reducing the fraction, the answer is -4/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/20-20/30 8/20-40/30 8/40-20/30 8/20-20/60 24/20-20/30 8/20-60/30 8/60-20/30 8/20-20/90 40/20-20/30 56/20-20/30