Add 8/5 and 84/21
1st number: 1 3/5, 2nd number: 4 0/21
8/5 + 84/21 is 28/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 5 × 21 = 105,
8/5 = 8 × 21/5 × 21 = 168/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
84/21 = 84 × 5/21 × 5 = 420/105 - Add the two like fractions:
168/105 + 420/105 = 168 + 420/105 = 588/105 - 588/105 simplified gives 28/5
- So, 8/5 + 84/21 = 28/5
In mixed form: 53/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/5+84/21 8/10+84/21 8/5+84/42 24/5+84/21 8/15+84/21 8/5+84/63 40/5+84/21 8/25+84/21 56/5+84/21 8/35+84/21