Add 84/21 and 28/35
1st number: 4 0/21, 2nd number: 28/35
84/21 + 28/35 is 24/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 35 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
84/21 = 84 × 5/21 × 5 = 420/105 - Likewise, for the 2nd fraction, since 35 × 3 = 105,
28/35 = 28 × 3/35 × 3 = 84/105 - Add the two like fractions:
420/105 + 84/105 = 420 + 84/105 = 504/105 - 504/105 simplified gives 24/5
- So, 84/21 + 28/35 = 24/5
In mixed form: 44/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21+56/35 84/42+28/35 84/21+28/70 84/21+84/35 84/63+28/35