Subtract 7/9 from 30/15
1st number: 2 0/15, 2nd number: 7/9
30/15 - 7/9 is 11/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 9 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 15 × 3 = 45,
30/15 = 30 × 3/15 × 3 = 90/45 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
7/9 = 7 × 5/9 × 5 = 35/45 - Subtract the two like fractions:
90/45 - 35/45 = 90 - 35/45 = 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: 60/15-7/9 30/15-14/9 30/15-7/18 90/15-7/9 30/15-21/9 30/45-7/9 30/15-7/27 30/15-35/9 30/75-7/9 30/15-7/45 30/15-49/9 30/15-7/63