Add 10/84 and 15/18
10/84 + 15/18 is 20/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 18 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 84 × 3 = 252,
10/84 = 10 × 3/84 × 3 = 30/252 - Likewise, for the 2nd fraction, since 18 × 14 = 252,
15/18 = 15 × 14/18 × 14 = 210/252 - Add the two like fractions:
30/252 + 210/252 = 30 + 210/252 = 240/252 - 240/252 simplified gives 20/21
- So, 10/84 + 15/18 = 20/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/84+15/18 10/84+30/18 10/84+15/36 30/84+15/18 10/84+45/18 10/84+15/54 50/84+15/18 10/84+75/18 10/84+15/90 70/84+15/18