Add 5/21 and 1/84
5/21 + 1/84 is 1/4.
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,
5/21 = 5 × 4/21 × 4 = 20/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
1/84 = 1 × 1/84 × 1 = 1/84 - Add the two like fractions:
20/84 + 1/84 = 20 + 1/84 = 21/84 - 21/84 simplified gives 1/4
- So, 5/21 + 1/84 = 1/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21+1/84 5/21+2/84 5/42+1/84 15/21+1/84 5/21+3/84 5/63+1/84 25/21+1/84 5/21+5/84 35/21+1/84 5/21+7/84