Add 40/42 and 21/16
1st number: 40/42, 2nd number: 1 5/16
40/42 + 21/16 is 761/336.
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,
40/42 = 40 × 8/42 × 8 = 320/336 - Likewise, for the 2nd fraction, since 16 × 21 = 336,
21/16 = 21 × 21/16 × 21 = 441/336 - Add the two like fractions:
320/336 + 441/336 = 320 + 441/336 = 761/336 - So, 40/42 + 21/16 = 761/336
In mixed form: 289/336
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/42+21/16 40/42+42/16 40/84+21/16 40/42+21/32 40/42+63/16 40/42+21/48 40/42+21/80