Add 20/84 and 21/4
1st number: 20/84, 2nd number: 5 1/4
20/84 + 21/4 is 461/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
20/84 = 20 × 1/84 × 1 = 20/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
21/4 = 21 × 21/4 × 21 = 441/84 - Add the two like fractions:
20/84 + 441/84 = 20 + 441/84 = 461/84 - So, 20/84 + 21/4 = 461/84
In mixed form: 541/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/84+21/4 20/84+42/4 20/84+21/8 60/84+21/4 20/84+63/4 20/84+21/12 20/84+21/20 20/84+21/28