Subtract 45/80 from 5/18
5/18 - 45/80 is -41/144.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 18 × 40 = 720,
5/18 = 5 × 40/18 × 40 = 200/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
45/80 = 45 × 9/80 × 9 = 405/720 - Subtract the two like fractions:
200/720 - 405/720 = 200 - 405/720 = -205/720 - After reducing the fraction, the answer is -41/144
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/18-45/80 5/18-90/80 5/36-45/80 15/18-45/80 5/54-45/80 25/18-45/80 5/90-45/80 35/18-45/80