Subtract 3/6 from 30/21
1st number: 1 9/21, 2nd number: 3/6
30/21 - 3/6 is 13/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
30/21 = 30 × 2/21 × 2 = 60/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
3/6 = 3 × 7/6 × 7 = 21/42 - Subtract the two like fractions:
60/42 - 21/42 = 60 - 21/42 = 39/42 - After reducing the fraction, the answer is 13/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/21-3/6 30/42-3/6 30/21-3/12 90/21-3/6 30/21-9/6 30/63-3/6 30/21-3/18 30/21-15/6 30/21-3/30 30/21-21/6 30/21-3/42