Add 15/21 and 5/16
15/21 + 5/16 is 115/112.
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,
15/21 = 15 × 16/21 × 16 = 240/336 - Likewise, for the 2nd fraction, since 16 × 21 = 336,
5/16 = 5 × 21/16 × 21 = 105/336 - Add the two like fractions:
240/336 + 105/336 = 240 + 105/336 = 345/336 - 345/336 simplified gives 115/112
- So, 15/21 + 5/16 = 115/112
In mixed form: 13/112
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/21+5/16 15/21+10/16 15/42+5/16 15/21+5/32 45/21+5/16 15/21+15/16 15/63+5/16 15/21+5/48 75/21+5/16 15/21+25/16 15/21+5/80 15/21+35/16