Add 30/10 and 21/81
1st number: 3 0/10, 2nd number: 21/81
30/10 + 21/81 is 88/27.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 81 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 10 × 81 = 810,
30/10 = 30 × 81/10 × 81 = 2430/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
21/81 = 21 × 10/81 × 10 = 210/810 - Add the two like fractions:
2430/810 + 210/810 = 2430 + 210/810 = 2640/810 - 2640/810 simplified gives 88/27
- So, 30/10 + 21/81 = 88/27
In mixed form: 37/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/10+21/81 30/10+42/81 30/20+21/81 90/10+21/81 30/10+63/81 30/50+21/81 30/70+21/81