Add 21/18 and 10/84
1st number: 1 3/18, 2nd number: 10/84
21/18 + 10/84 is 9/7.
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,
21/18 = 21 × 14/18 × 14 = 294/252 - Likewise, for the 2nd fraction, since 84 × 3 = 252,
10/84 = 10 × 3/84 × 3 = 30/252 - Add the two like fractions:
294/252 + 30/252 = 294 + 30/252 = 324/252 - 324/252 simplified gives 9/7
- So, 21/18 + 10/84 = 9/7
In mixed form: 12/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/18+10/84 21/18+20/84 21/36+10/84 63/18+10/84 21/18+30/84 21/54+10/84 21/18+50/84 21/90+10/84 21/18+70/84