Subtract 30/9 from 45/18
1st number: 2 9/18, 2nd number: 3 3/9
45/18 - 30/9 is -5/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 9 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 18 × 1 = 18,
45/18 = 45 × 1/18 × 1 = 45/18 - Likewise, for the 2nd fraction, since 9 × 2 = 18,
30/9 = 30 × 2/9 × 2 = 60/18 - Subtract the two like fractions:
45/18 - 60/18 = 45 - 60/18 = -15/18 - After reducing the fraction, the answer is -5/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/18-30/9 45/18-60/9 45/36-30/9 45/18-30/18 45/18-90/9 45/54-30/9 45/18-30/27 45/90-30/9 45/18-30/45 45/18-30/63