Add 81/14 and 9/21
1st number: 5 11/14, 2nd number: 9/21
81/14 + 9/21 is 87/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 14 × 3 = 42,
81/14 = 81 × 3/14 × 3 = 243/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
9/21 = 9 × 2/21 × 2 = 18/42 - Add the two like fractions:
243/42 + 18/42 = 243 + 18/42 = 261/42 - 261/42 simplified gives 87/14
- So, 81/14 + 9/21 = 87/14
In mixed form: 63/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/14+18/21 81/28+9/21 81/14+9/42 81/14+27/21 81/42+9/21 81/14+9/63 81/14+45/21 81/70+9/21 81/14+63/21 81/98+9/21