Subtract 50/30 from 80/50
1st number: 1 30/50, 2nd number: 1 20/30
80/50 - 50/30 is -1/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 30 is 150
Next, find the equivalent fraction of both fractional numbers with denominator 150 - For the 1st fraction, since 50 × 3 = 150,
80/50 = 80 × 3/50 × 3 = 240/150 - Likewise, for the 2nd fraction, since 30 × 5 = 150,
50/30 = 50 × 5/30 × 5 = 250/150 - Subtract the two like fractions:
240/150 - 250/150 = 240 - 250/150 = -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: 80/50-50/60 80/50-50/90