Add 18/81 and 9/20
18/81 + 9/20 is 121/180.
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,
9/20 = 9 × 81/20 × 81 = 729/1620 - Add the two like fractions:
360/1620 + 729/1620 = 360 + 729/1620 = 1089/1620 - 1089/1620 simplified gives 121/180
- So, 18/81 + 9/20 = 121/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/81+9/20 18/81+18/20 18/81+9/40 54/81+9/20 18/81+27/20 18/81+9/60 90/81+9/20 18/81+45/20 18/81+63/20