Add 6/21 and 20/84
6/21 + 20/84 is 11/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
6/21 = 6 × 4/21 × 4 = 24/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
20/84 = 20 × 1/84 × 1 = 20/84 - Add the two like fractions:
24/84 + 20/84 = 24 + 20/84 = 44/84 - 44/84 simplified gives 11/21
- So, 6/21 + 20/84 = 11/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21+20/84 6/21+40/84 6/42+20/84 18/21+20/84 6/21+60/84 6/63+20/84 30/21+20/84 42/21+20/84