Add 9/21 and 84/45
1st number: 9/21, 2nd number: 1 39/45
9/21 + 84/45 is 241/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 21 × 15 = 315,
9/21 = 9 × 15/21 × 15 = 135/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
84/45 = 84 × 7/45 × 7 = 588/315 - Add the two like fractions:
135/315 + 588/315 = 135 + 588/315 = 723/315 - 723/315 simplified gives 241/105
- So, 9/21 + 84/45 = 241/105
In mixed form: 231/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/21+84/45 9/42+84/45 9/21+84/90 27/21+84/45 9/63+84/45 45/21+84/45 63/21+84/45