Subtract 7/15 from 45/18
1st number: 2 9/18, 2nd number: 7/15
45/18 - 7/15 is 61/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 15 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
45/18 = 45 × 5/18 × 5 = 225/90 - Likewise, for the 2nd fraction, since 15 × 6 = 90,
7/15 = 7 × 6/15 × 6 = 42/90 - Subtract the two like fractions:
225/90 - 42/90 = 225 - 42/90 = 183/90 - After reducing the fraction, the answer is 61/30
- In mixed form: 21/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/18-7/15 45/18-14/15 45/36-7/15 45/18-7/30 45/18-21/15 45/54-7/15 45/18-7/45 45/18-35/15 45/90-7/15 45/18-7/75 45/18-49/15