Add 21/84 and 2/21
21/84 + 2/21 is 29/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
21/84 = 21 × 1/84 × 1 = 21/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
2/21 = 2 × 4/21 × 4 = 8/84 - Add the two like fractions:
21/84 + 8/84 = 21 + 8/84 = 29/84 - So, 21/84 + 2/21 = 29/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/84+2/21 21/84+4/21 21/84+2/42 63/84+2/21 21/84+6/21 21/84+2/63 21/84+10/21 21/84+14/21