Add 8/5 and 21/84
1st number: 1 3/5, 2nd number: 21/84
8/5 + 21/84 is 37/20.
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,
8/5 = 8 × 84/5 × 84 = 672/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
21/84 = 21 × 5/84 × 5 = 105/420 - Add the two like fractions:
672/420 + 105/420 = 672 + 105/420 = 777/420 - 777/420 simplified gives 37/20
- So, 8/5 + 21/84 = 37/20
In mixed form: 117/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/5+21/84 8/5+42/84 8/10+21/84 24/5+21/84 8/5+63/84 8/15+21/84 40/5+21/84 8/25+21/84 56/5+21/84 8/35+21/84