Add 3/21 and 4/16
3/21 + 4/16 is 11/28.
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,
3/21 = 3 × 16/21 × 16 = 48/336 - Likewise, for the 2nd fraction, since 16 × 21 = 336,
4/16 = 4 × 21/16 × 21 = 84/336 - Add the two like fractions:
48/336 + 84/336 = 48 + 84/336 = 132/336 - 132/336 simplified gives 11/28
- So, 3/21 + 4/16 = 11/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/21+4/16 3/21+8/16 3/42+4/16 3/21+4/32 9/21+4/16 3/21+12/16 3/63+4/16 3/21+4/48 15/21+4/16 3/21+20/16 3/21+4/80 3/21+28/16