Subtract 45/18 from 2/8
1st number: 2/8, 2nd number: 2 9/18
2/8 - 45/18 is -9/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 18 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 8 × 9 = 72,
2/8 = 2 × 9/8 × 9 = 18/72 - Likewise, for the 2nd fraction, since 18 × 4 = 72,
45/18 = 45 × 4/18 × 4 = 180/72 - Subtract the two like fractions:
18/72 - 180/72 = 18 - 180/72 = -162/72 - After reducing the fraction, the answer is -9/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/8-45/18 2/8-90/18 2/16-45/18 2/8-45/36 6/8-45/18 2/24-45/18 2/8-45/54 10/8-45/18 2/40-45/18 2/8-45/90 14/8-45/18 2/56-45/18