Subtract 45/9 from 20/5
1st number: 4 0/5, 2nd number: 5 0/9
20/5 - 45/9 is -1/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 9 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 5 × 9 = 45,
20/5 = 20 × 9/5 × 9 = 180/45 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
45/9 = 45 × 5/9 × 5 = 225/45 - Subtract the two like fractions:
180/45 - 225/45 = 180 - 225/45 = -45/45 - After reducing the fraction, the answer is -1/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/5-45/9 20/5-90/9 20/10-45/9 20/5-45/18 60/5-45/9 20/15-45/9 20/5-45/27 20/25-45/9 20/35-45/9 20/5-45/63