Add 70/42 and 21/16
1st number: 1 28/42, 2nd number: 1 5/16
70/42 + 21/16 is 143/48.
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,
70/42 = 70 × 8/42 × 8 = 560/336 - Likewise, for the 2nd fraction, since 16 × 21 = 336,
21/16 = 21 × 21/16 × 21 = 441/336 - Add the two like fractions:
560/336 + 441/336 = 560 + 441/336 = 1001/336 - 1001/336 simplified gives 143/48
- So, 70/42 + 21/16 = 143/48
In mixed form: 247/48
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/42+42/16 70/84+21/16 70/42+21/32 70/42+63/16 70/42+21/48 70/42+21/80