Add 18/81 and 42/60
18/81 + 42/60 is 83/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 60 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 60 × 27 = 1620,
42/60 = 42 × 27/60 × 27 = 1134/1620 - Add the two like fractions:
360/1620 + 1134/1620 = 360 + 1134/1620 = 1494/1620 - 1494/1620 simplified gives 83/90
- So, 18/81 + 42/60 = 83/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/81+42/60 18/81+84/60 54/81+42/60 90/81+42/60