Add 28/21 and 8/16
1st number: 1 7/21, 2nd number: 8/16
28/21 + 8/16 is 11/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 16 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 21 × 16 = 336,
28/21 = 28 × 16/21 × 16 = 448/336 - Likewise, for the 2nd fraction, since 16 × 21 = 336,
8/16 = 8 × 21/16 × 21 = 168/336 - Add the two like fractions:
448/336 + 168/336 = 448 + 168/336 = 616/336 - 616/336 simplified gives 11/6
- So, 28/21 + 8/16 = 11/6
In mixed form: 15/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21+8/16 28/42+8/16 28/21+8/32 84/21+8/16 28/21+24/16 28/63+8/16 28/21+8/48 28/21+40/16 28/21+8/80 28/21+56/16