Subtract 5/30 from 6/21
6/21 - 5/30 is 5/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
6/21 = 6 × 10/21 × 10 = 60/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
5/30 = 5 × 7/30 × 7 = 35/210 - Subtract the two like fractions:
60/210 - 35/210 = 60 - 35/210 = 25/210 - After reducing the fraction, the answer is 5/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21-5/30 6/21-10/30 6/42-5/30 6/21-5/60 18/21-5/30 6/21-15/30 6/63-5/30 6/21-5/90 30/21-5/30 6/21-25/30 42/21-5/30 6/21-35/30