Subtract 9/15 from 7/30
7/30 - 9/15 is -11/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 15 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 30 × 1 = 30,
7/30 = 7 × 1/30 × 1 = 7/30 - Likewise, for the 2nd fraction, since 15 × 2 = 30,
9/15 = 9 × 2/15 × 2 = 18/30 - Subtract the two like fractions:
7/30 - 18/30 = 7 - 18/30 = -11/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/30-9/15 7/30-18/15 7/60-9/15 7/30-9/30 21/30-9/15 7/30-27/15 7/90-9/15 7/30-9/45 35/30-9/15 7/30-45/15 7/30-9/75 49/30-9/15 7/30-63/15