Add 20/5 and 98/81
1st number: 4 0/5, 2nd number: 1 17/81
20/5 + 98/81 is 422/81.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 5 × 81 = 405,
20/5 = 20 × 81/5 × 81 = 1620/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
98/81 = 98 × 5/81 × 5 = 490/405 - Add the two like fractions:
1620/405 + 490/405 = 1620 + 490/405 = 2110/405 - 2110/405 simplified gives 422/81
- So, 20/5 + 98/81 = 422/81
In mixed form: 517/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/5+98/81 20/10+98/81 60/5+98/81 20/15+98/81 20/25+98/81 20/35+98/81