Subtract 10/20 from 15/80
15/80 - 10/20 is -5/16.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 20 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
15/80 = 15 × 1/80 × 1 = 15/80 - Likewise, for the 2nd fraction, since 20 × 4 = 80,
10/20 = 10 × 4/20 × 4 = 40/80 - Subtract the two like fractions:
15/80 - 40/80 = 15 - 40/80 = -25/80 - After reducing the fraction, the answer is -5/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/80-10/20 15/80-10/40 45/80-10/20 15/80-30/20 15/80-10/60 75/80-10/20 15/80-50/20 15/80-70/20