Subtract 18/9 from 18/45
1st number: 18/45, 2nd number: 2 0/9
18/45 - 18/9 is -8/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 9 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 45 × 1 = 45,
18/45 = 18 × 1/45 × 1 = 18/45 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
18/9 = 18 × 5/9 × 5 = 90/45 - Subtract the two like fractions:
18/45 - 90/45 = 18 - 90/45 = -72/45 - After reducing the fraction, the answer is -8/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/45-18/9 18/45-36/9 18/90-18/9 54/45-18/9 18/45-54/9 18/45-18/27 90/45-18/9 18/45-90/9 18/45-18/45 18/45-18/63