Add 4/18 and 21/84
4/18 + 21/84 is 17/36.
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,
4/18 = 4 × 14/18 × 14 = 56/252 - Likewise, for the 2nd fraction, since 84 × 3 = 252,
21/84 = 21 × 3/84 × 3 = 63/252 - Add the two like fractions:
56/252 + 63/252 = 56 + 63/252 = 119/252 - 119/252 simplified gives 17/36
- So, 4/18 + 21/84 = 17/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/18+21/84 4/18+42/84 4/36+21/84 12/18+21/84 4/18+63/84 4/54+21/84 20/18+21/84 4/90+21/84 28/18+21/84