Subtract 75/45 from 20/18
1st number: 1 2/18, 2nd number: 1 30/45
20/18 - 75/45 is -5/9.
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,
75/45 = 75 × 2/45 × 2 = 150/90 - Subtract the two like fractions:
100/90 - 150/90 = 100 - 150/90 = -50/90 - After reducing the fraction, the answer is -5/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/18-75/45 20/36-75/45 20/18-75/90 60/18-75/45 20/54-75/45 20/90-75/45