Subtract 20/45 from 15/9
1st number: 1 6/9, 2nd number: 20/45
15/9 - 20/45 is 11/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 45 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 9 × 5 = 45,
15/9 = 15 × 5/9 × 5 = 75/45 - Likewise, for the 2nd fraction, since 45 × 1 = 45,
20/45 = 20 × 1/45 × 1 = 20/45 - Subtract the two like fractions:
75/45 - 20/45 = 75 - 20/45 = 55/45 - After reducing the fraction, the answer is 11/9
- In mixed form: 12/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/9-20/45 15/9-40/45 15/18-20/45 15/9-20/90 45/9-20/45 15/9-60/45 15/27-20/45 75/9-20/45 15/45-20/45 15/63-20/45