Subtract 20/50 from 10/30
10/30 - 20/50 is -1/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 50 is 150
Next, find the equivalent fraction of both fractional numbers with denominator 150 - For the 1st fraction, since 30 × 5 = 150,
10/30 = 10 × 5/30 × 5 = 50/150 - Likewise, for the 2nd fraction, since 50 × 3 = 150,
20/50 = 20 × 3/50 × 3 = 60/150 - Subtract the two like fractions:
50/150 - 60/150 = 50 - 60/150 = -10/150 - After reducing the fraction, the answer is -1/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/30-20/50 10/30-40/50 10/60-20/50 10/30-60/50 10/90-20/50 50/30-20/50 70/30-20/50