Subtract 4/5 from 20/30
20/30 - 4/5 is -2/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 5 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 30 × 1 = 30,
20/30 = 20 × 1/30 × 1 = 20/30 - Likewise, for the 2nd fraction, since 5 × 6 = 30,
4/5 = 4 × 6/5 × 6 = 24/30 - Subtract the two like fractions:
20/30 - 24/30 = 20 - 24/30 = -4/30 - 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: 40/30-4/5 20/30-8/5 20/60-4/5 20/30-4/10 60/30-4/5 20/30-12/5 20/90-4/5 20/30-4/15 20/30-20/5 20/30-4/25 20/30-28/5 20/30-4/35