Add 3/21 and 12/16
3/21 + 12/16 is 25/28.
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,
12/16 = 12 × 21/16 × 21 = 252/336 - Add the two like fractions:
48/336 + 252/336 = 48 + 252/336 = 300/336 - 300/336 simplified gives 25/28
- So, 3/21 + 12/16 = 25/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/21+12/16 3/21+24/16 3/42+12/16 3/21+12/32 9/21+12/16 3/21+36/16 3/63+12/16 3/21+12/48 15/21+12/16 3/21+60/16 3/21+12/80 3/21+84/16