Add 70/21 and 81/16
1st number: 3 7/21, 2nd number: 5 1/16
70/21 + 81/16 is 403/48.
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,
70/21 = 70 × 16/21 × 16 = 1120/336 - Likewise, for the 2nd fraction, since 16 × 21 = 336,
81/16 = 81 × 21/16 × 21 = 1701/336 - Add the two like fractions:
1120/336 + 1701/336 = 1120 + 1701/336 = 2821/336 - 2821/336 simplified gives 403/48
- So, 70/21 + 81/16 = 403/48
In mixed form: 819/48
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/42+81/16 70/21+81/32 70/63+81/16 70/21+81/48 70/21+81/80