Add 21/42 and 49/16
1st number: 21/42, 2nd number: 3 1/16
21/42 + 49/16 is 57/16.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 16 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 42 × 8 = 336,
21/42 = 21 × 8/42 × 8 = 168/336 - Likewise, for the 2nd fraction, since 16 × 21 = 336,
49/16 = 49 × 21/16 × 21 = 1029/336 - Add the two like fractions:
168/336 + 1029/336 = 168 + 1029/336 = 1197/336 - 1197/336 simplified gives 57/16
- So, 21/42 + 49/16 = 57/16
In mixed form: 39/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 21/42+98/16 21/84+49/16 21/42+49/32 63/42+49/16 21/42+49/48 21/42+49/80