Add 40/10 and 21/81
1st number: 4 0/10, 2nd number: 21/81
40/10 + 21/81 is 115/27.
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,
40/10 = 40 × 81/10 × 81 = 3240/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
21/81 = 21 × 10/81 × 10 = 210/810 - Add the two like fractions:
3240/810 + 210/810 = 3240 + 210/810 = 3450/810 - 3450/810 simplified gives 115/27
- So, 40/10 + 21/81 = 115/27
In mixed form: 47/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/10+21/81 40/10+42/81 40/20+21/81 40/10+63/81 40/30+21/81 40/50+21/81 40/70+21/81