Subtract 21/18 from 30/3
1st number: 10 0/3, 2nd number: 1 3/18
30/3 - 21/18 is 53/6.
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,
30/3 = 30 × 6/3 × 6 = 180/18 - Likewise, for the 2nd fraction, since 18 × 1 = 18,
21/18 = 21 × 1/18 × 1 = 21/18 - Subtract the two like fractions:
180/18 - 21/18 = 180 - 21/18 = 159/18 - After reducing the fraction, the answer is 53/6
- In mixed form: 85/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/3-21/18 30/3-42/18 30/6-21/18 30/3-21/36 90/3-21/18 30/3-63/18 30/9-21/18 30/3-21/54 30/15-21/18 30/3-21/90 30/21-21/18