Add 42/21 and 21/48
1st number: 2 0/21, 2nd number: 21/48
42/21 + 21/48 is 39/16.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 48 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 48 × 7 = 336,
21/48 = 21 × 7/48 × 7 = 147/336 - Add the two like fractions:
672/336 + 147/336 = 672 + 147/336 = 819/336 - 819/336 simplified gives 39/16
- So, 42/21 + 21/48 = 39/16
In mixed form: 27/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21+21/48 42/21+42/48 42/21+21/96 42/21+63/48 42/63+21/48