Subtract 8/20 from 15/9
1st number: 1 6/9, 2nd number: 8/20
15/9 - 8/20 is 19/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 9 × 20 = 180,
15/9 = 15 × 20/9 × 20 = 300/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
8/20 = 8 × 9/20 × 9 = 72/180 - Subtract the two like fractions:
300/180 - 72/180 = 300 - 72/180 = 228/180 - After reducing the fraction, the answer is 19/15
- In mixed form: 14/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/9-8/20 15/9-16/20 15/18-8/20 15/9-8/40 45/9-8/20 15/9-24/20 15/27-8/20 15/9-8/60 75/9-8/20 15/9-40/20 15/45-8/20 15/9-56/20 15/63-8/20