Subtract 3/18 from 10/80
10/80 - 3/18 is -1/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 18 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
10/80 = 10 × 9/80 × 9 = 90/720 - Likewise, for the 2nd fraction, since 18 × 40 = 720,
3/18 = 3 × 40/18 × 40 = 120/720 - Subtract the two like fractions:
90/720 - 120/720 = 90 - 120/720 = -30/720 - After reducing the fraction, the answer is -1/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/80-3/18 10/80-6/18 10/80-3/36 30/80-3/18 10/80-9/18 10/80-3/54 50/80-3/18 10/80-15/18 10/80-3/90 70/80-3/18 10/80-21/18