Add 15/18 and 20/84
15/18 + 20/84 is 15/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 84 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 18 × 14 = 252,
15/18 = 15 × 14/18 × 14 = 210/252 - Likewise, for the 2nd fraction, since 84 × 3 = 252,
20/84 = 20 × 3/84 × 3 = 60/252 - Add the two like fractions:
210/252 + 60/252 = 210 + 60/252 = 270/252 - 270/252 simplified gives 15/14
- So, 15/18 + 20/84 = 15/14
In mixed form: 11/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/18+20/84 15/18+40/84 15/36+20/84 45/18+20/84 15/18+60/84 15/54+20/84 75/18+20/84 15/90+20/84