Add 18/81 and 98/20
1st number: 18/81, 2nd number: 4 18/20
18/81 + 98/20 is 461/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 20 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 81 × 20 = 1620,
18/81 = 18 × 20/81 × 20 = 360/1620 - Likewise, for the 2nd fraction, since 20 × 81 = 1620,
98/20 = 98 × 81/20 × 81 = 7938/1620 - Add the two like fractions:
360/1620 + 7938/1620 = 360 + 7938/1620 = 8298/1620 - 8298/1620 simplified gives 461/90
- So, 18/81 + 98/20 = 461/90
In mixed form: 511/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/81+98/20 18/81+98/40 54/81+98/20 18/81+98/60 90/81+98/20