Subtract 21/30 from 21/3
1st number: 7 0/3, 2nd number: 21/30
21/3 - 21/30 is 63/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 30 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 3 × 10 = 30,
21/3 = 21 × 10/3 × 10 = 210/30 - Likewise, for the 2nd fraction, since 30 × 1 = 30,
21/30 = 21 × 1/30 × 1 = 21/30 - Subtract the two like fractions:
210/30 - 21/30 = 210 - 21/30 = 189/30 - After reducing the fraction, the answer is 63/10
- In mixed form: 63/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/3-21/30 21/3-42/30 21/6-21/30 21/3-21/60 63/3-21/30 21/3-63/30 21/9-21/30 21/3-21/90 21/15-21/30