Add 84/5 and 21/84
1st number: 16 4/5, 2nd number: 21/84
84/5 + 21/84 is 341/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 5 × 84 = 420,
84/5 = 84 × 84/5 × 84 = 7056/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
21/84 = 21 × 5/84 × 5 = 105/420 - Add the two like fractions:
7056/420 + 105/420 = 7056 + 105/420 = 7161/420 - 7161/420 simplified gives 341/20
- So, 84/5 + 21/84 = 341/20
In mixed form: 171/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/5+42/84 84/10+21/84 84/5+63/84 84/15+21/84 84/25+21/84 84/35+21/84