Subtract 8/9 from 15/30
15/30 - 8/9 is -7/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 9 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
15/30 = 15 × 3/30 × 3 = 45/90 - Likewise, for the 2nd fraction, since 9 × 10 = 90,
8/9 = 8 × 10/9 × 10 = 80/90 - Subtract the two like fractions:
45/90 - 80/90 = 45 - 80/90 = -35/90 - After reducing the fraction, the answer is -7/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 15/30-16/9 15/60-8/9 15/30-8/18 45/30-8/9 15/30-24/9 15/90-8/9 15/30-8/27 75/30-8/9 15/30-40/9 15/30-8/45 15/30-56/9 15/30-8/63