Add 15/10 and 21/81
1st number: 1 5/10, 2nd number: 21/81
15/10 + 21/81 is 95/54.
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,
15/10 = 15 × 81/10 × 81 = 1215/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
21/81 = 21 × 10/81 × 10 = 210/810 - Add the two like fractions:
1215/810 + 210/810 = 1215 + 210/810 = 1425/810 - 1425/810 simplified gives 95/54
- So, 15/10 + 21/81 = 95/54
In mixed form: 141/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/10+21/81 15/10+42/81 15/20+21/81 45/10+21/81 15/10+63/81 15/30+21/81 75/10+21/81 15/50+21/81 15/70+21/81