Subtract 3/15 from 45/36
1st number: 1 9/36, 2nd number: 3/15
45/36 - 3/15 is 21/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 15 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 36 × 5 = 180,
45/36 = 45 × 5/36 × 5 = 225/180 - Likewise, for the 2nd fraction, since 15 × 12 = 180,
3/15 = 3 × 12/15 × 12 = 36/180 - Subtract the two like fractions:
225/180 - 36/180 = 225 - 36/180 = 189/180 - After reducing the fraction, the answer is 21/20
- In mixed form: 11/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/36-3/15 45/36-6/15 45/72-3/15 45/36-3/30 45/36-9/15 45/36-3/45 45/36-3/75 45/36-21/15