Add 3/21 and 84/16
1st number: 3/21, 2nd number: 5 4/16
3/21 + 84/16 is 151/28.
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,
84/16 = 84 × 21/16 × 21 = 1764/336 - Add the two like fractions:
48/336 + 1764/336 = 48 + 1764/336 = 1812/336 - 1812/336 simplified gives 151/28
- So, 3/21 + 84/16 = 151/28
In mixed form: 511/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/21+84/16 3/42+84/16 3/21+84/32 9/21+84/16 3/63+84/16 3/21+84/48 15/21+84/16 3/21+84/80