Add 42/21 and 15/16
1st number: 2 0/21, 2nd number: 15/16
42/21 + 15/16 is 47/16.
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,
42/21 = 42 × 16/21 × 16 = 672/336 - Likewise, for the 2nd fraction, since 16 × 21 = 336,
15/16 = 15 × 21/16 × 21 = 315/336 - Add the two like fractions:
672/336 + 315/336 = 672 + 315/336 = 987/336 - 987/336 simplified gives 47/16
- So, 42/21 + 15/16 = 47/16
In mixed form: 215/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21+15/16 42/21+30/16 42/21+15/32 42/21+45/16 42/63+15/16 42/21+15/48 42/21+75/16 42/21+15/80