Add 21/81 and 30/10
1st number: 21/81, 2nd number: 3 0/10
21/81 + 30/10 is 88/27.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 10 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 81 × 10 = 810,
21/81 = 21 × 10/81 × 10 = 210/810 - Likewise, for the 2nd fraction, since 10 × 81 = 810,
30/10 = 30 × 81/10 × 81 = 2430/810 - Add the two like fractions:
210/810 + 2430/810 = 210 + 2430/810 = 2640/810 - 2640/810 simplified gives 88/27
- So, 21/81 + 30/10 = 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: 42/81+30/10 21/81+60/10 21/81+30/20 63/81+30/10 21/81+90/10 21/81+30/50 21/81+30/70