Subtract 16/18 from 9/15
9/15 - 16/18 is -13/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
9/15 = 9 × 6/15 × 6 = 54/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
16/18 = 16 × 5/18 × 5 = 80/90 - Subtract the two like fractions:
54/90 - 80/90 = 54 - 80/90 = -26/90 - After reducing the fraction, the answer is -13/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/15-16/18 9/15-32/18 9/30-16/18 9/15-16/36 27/15-16/18 9/15-48/18 9/45-16/18 9/15-16/54 45/15-16/18 9/15-80/18 9/75-16/18 9/15-16/90 63/15-16/18