Subtract 4/30 from 5/21
5/21 - 4/30 is 11/105.
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,
5/21 = 5 × 10/21 × 10 = 50/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
4/30 = 4 × 7/30 × 7 = 28/210 - Subtract the two like fractions:
50/210 - 28/210 = 50 - 28/210 = 22/210 - After reducing the fraction, the answer is 11/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21-4/30 5/21-8/30 5/42-4/30 5/21-4/60 15/21-4/30 5/21-12/30 5/63-4/30 5/21-4/90 25/21-4/30 5/21-20/30 35/21-4/30 5/21-28/30