Add 9/2 and 21/84
1st number: 4 1/2, 2nd number: 21/84
9/2 + 21/84 is 19/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 2 × 42 = 84,
9/2 = 9 × 42/2 × 42 = 378/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
21/84 = 21 × 1/84 × 1 = 21/84 - Add the two like fractions:
378/84 + 21/84 = 378 + 21/84 = 399/84 - 399/84 simplified gives 19/4
- So, 9/2 + 21/84 = 19/4
In mixed form: 43/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/2+21/84 9/2+42/84 9/4+21/84 27/2+21/84 9/2+63/84 9/6+21/84 45/2+21/84 9/10+21/84 63/2+21/84 9/14+21/84