Add 18/16 and 21/84
1st number: 1 2/16, 2nd number: 21/84
18/16 + 21/84 is 11/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 84 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 16 × 21 = 336,
18/16 = 18 × 21/16 × 21 = 378/336 - Likewise, for the 2nd fraction, since 84 × 4 = 336,
21/84 = 21 × 4/84 × 4 = 84/336 - Add the two like fractions:
378/336 + 84/336 = 378 + 84/336 = 462/336 - 462/336 simplified gives 11/8
- So, 18/16 + 21/84 = 11/8
In mixed form: 13/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/16+21/84 18/16+42/84 18/32+21/84 54/16+21/84 18/16+63/84 18/48+21/84 90/16+21/84 18/80+21/84