Subtract 20/36 from 45/18
1st number: 2 9/18, 2nd number: 20/36
45/18 - 20/36 is 35/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 36 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 18 × 2 = 36,
45/18 = 45 × 2/18 × 2 = 90/36 - Likewise, for the 2nd fraction, since 36 × 1 = 36,
20/36 = 20 × 1/36 × 1 = 20/36 - Subtract the two like fractions:
90/36 - 20/36 = 90 - 20/36 = 70/36 - After reducing the fraction, the answer is 35/18
- In mixed form: 117/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/18-20/36 45/18-40/36 45/36-20/36 45/18-20/72 45/18-60/36 45/54-20/36 45/90-20/36