Subtract 15/30 from 7/9
7/9 - 15/30 is 5/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 9 × 10 = 90,
7/9 = 7 × 10/9 × 10 = 70/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
15/30 = 15 × 3/30 × 3 = 45/90 - Subtract the two like fractions:
70/90 - 45/90 = 70 - 45/90 = 25/90 - After reducing the fraction, the answer is 5/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/9-15/30 7/18-15/30 7/9-15/60 21/9-15/30 7/9-45/30 7/27-15/30 7/9-15/90 35/9-15/30 7/9-75/30 7/45-15/30 49/9-15/30 7/63-15/30