Subtract 15/50 from 3/80
3/80 - 15/50 is -21/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 50 is 400
Next, find the equivalent fraction of both fractional numbers with denominator 400 - For the 1st fraction, since 80 × 5 = 400,
3/80 = 3 × 5/80 × 5 = 15/400 - Likewise, for the 2nd fraction, since 50 × 8 = 400,
15/50 = 15 × 8/50 × 8 = 120/400 - Subtract the two like fractions:
15/400 - 120/400 = 15 - 120/400 = -105/400 - After reducing the fraction, the answer is -21/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/80-15/50 3/80-30/50 9/80-15/50 3/80-45/50 15/80-15/50 3/80-75/50 21/80-15/50