Subtract 10/45 from 20/18
1st number: 1 2/18, 2nd number: 10/45
20/18 - 10/45 is 8/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
20/18 = 20 × 5/18 × 5 = 100/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
10/45 = 10 × 2/45 × 2 = 20/90 - Subtract the two like fractions:
100/90 - 20/90 = 100 - 20/90 = 80/90 - After reducing the fraction, the answer is 8/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/18-10/45 20/18-20/45 20/36-10/45 20/18-10/90 60/18-10/45 20/18-30/45 20/54-10/45 20/18-50/45 20/90-10/45 20/18-70/45