Add 9/2 and 81/21
1st number: 4 1/2, 2nd number: 3 18/21
9/2 + 81/21 is 117/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
9/2 = 9 × 21/2 × 21 = 189/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
81/21 = 81 × 2/21 × 2 = 162/42 - Add the two like fractions:
189/42 + 162/42 = 189 + 162/42 = 351/42 - 351/42 simplified gives 117/14
- So, 9/2 + 81/21 = 117/14
In mixed form: 85/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/2+81/21 9/4+81/21 9/2+81/42 27/2+81/21 9/6+81/21 9/2+81/63 45/2+81/21 9/10+81/21 63/2+81/21 9/14+81/21