Add 4/21 and 6/20
4/21 + 6/20 is 103/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
4/21 = 4 × 20/21 × 20 = 80/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
6/20 = 6 × 21/20 × 21 = 126/420 - Add the two like fractions:
80/420 + 126/420 = 80 + 126/420 = 206/420 - 206/420 simplified gives 103/210
- So, 4/21 + 6/20 = 103/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21+6/20 4/21+12/20 4/42+6/20 4/21+6/40 12/21+6/20 4/21+18/20 4/63+6/20 4/21+6/60 20/21+6/20 4/21+30/20 28/21+6/20 4/21+42/20