Subtract 30/50 from 3/15
3/15 - 30/50 is -2/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 50 is 150
Next, find the equivalent fraction of both fractional numbers with denominator 150 - For the 1st fraction, since 15 × 10 = 150,
3/15 = 3 × 10/15 × 10 = 30/150 - Likewise, for the 2nd fraction, since 50 × 3 = 150,
30/50 = 30 × 3/50 × 3 = 90/150 - Subtract the two like fractions:
30/150 - 90/150 = 30 - 90/150 = -60/150 - After reducing the fraction, the answer is -2/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/15-30/50 3/15-60/50 3/30-30/50 9/15-30/50 3/15-90/50 3/45-30/50 3/75-30/50 21/15-30/50