Subtract 18/80 from 15/50
15/50 - 18/80 is 3/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 80 is 400
Next, find the equivalent fraction of both fractional numbers with denominator 400 - For the 1st fraction, since 50 × 8 = 400,
15/50 = 15 × 8/50 × 8 = 120/400 - Likewise, for the 2nd fraction, since 80 × 5 = 400,
18/80 = 18 × 5/80 × 5 = 90/400 - Subtract the two like fractions:
120/400 - 90/400 = 120 - 90/400 = 30/400 - After reducing the fraction, the answer is 3/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/50-18/80 15/50-36/80 45/50-18/80 15/50-54/80 75/50-18/80 15/50-90/80