Add 4/9 and 84/21
1st number: 4/9, 2nd number: 4 0/21
4/9 + 84/21 is 40/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 21 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 9 × 7 = 63,
4/9 = 4 × 7/9 × 7 = 28/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
84/21 = 84 × 3/21 × 3 = 252/63 - Add the two like fractions:
28/63 + 252/63 = 28 + 252/63 = 280/63 - 280/63 simplified gives 40/9
- So, 4/9 + 84/21 = 40/9
In mixed form: 44/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/9+84/21 4/18+84/21 4/9+84/42 12/9+84/21 4/27+84/21 4/9+84/63 20/9+84/21 4/45+84/21 28/9+84/21 4/63+84/21