Add 2/21 and 81/5
1st number: 2/21, 2nd number: 16 1/5
2/21 + 81/5 is 1711/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 5 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
2/21 = 2 × 5/21 × 5 = 10/105 - Likewise, for the 2nd fraction, since 5 × 21 = 105,
81/5 = 81 × 21/5 × 21 = 1701/105 - Add the two like fractions:
10/105 + 1701/105 = 10 + 1701/105 = 1711/105 - So, 2/21 + 81/5 = 1711/105
In mixed form: 1631/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/21+81/5 2/42+81/5 2/21+81/10 6/21+81/5 2/63+81/5 2/21+81/15 10/21+81/5 2/21+81/25 14/21+81/5 2/21+81/35