Subtract 21/18 from 45/3
1st number: 15 0/3, 2nd number: 1 3/18
45/3 - 21/18 is 83/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 18 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 3 × 6 = 18,
45/3 = 45 × 6/3 × 6 = 270/18 - Likewise, for the 2nd fraction, since 18 × 1 = 18,
21/18 = 21 × 1/18 × 1 = 21/18 - Subtract the two like fractions:
270/18 - 21/18 = 270 - 21/18 = 249/18 - After reducing the fraction, the answer is 83/6
- In mixed form: 135/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/3-21/18 45/3-42/18 45/6-21/18 45/3-21/36 45/3-63/18 45/9-21/18 45/3-21/54 45/15-21/18 45/3-21/90 45/21-21/18