Subtract 5/30 from 8/21
8/21 - 5/30 is 3/14.
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,
8/21 = 8 × 10/21 × 10 = 80/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
5/30 = 5 × 7/30 × 7 = 35/210 - Subtract the two like fractions:
80/210 - 35/210 = 80 - 35/210 = 45/210 - After reducing the fraction, the answer is 3/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/21-5/30 8/21-10/30 8/42-5/30 8/21-5/60 24/21-5/30 8/21-15/30 8/63-5/30 8/21-5/90 40/21-5/30 8/21-25/30 56/21-5/30 8/21-35/30