Add 16/28 and 28/21
1st number: 16/28, 2nd number: 1 7/21
16/28 + 28/21 is 40/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
16/28 = 16 × 3/28 × 3 = 48/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
28/21 = 28 × 4/21 × 4 = 112/84 - Add the two like fractions:
48/84 + 112/84 = 48 + 112/84 = 160/84 - 160/84 simplified gives 40/21
- So, 16/28 + 28/21 = 40/21
In mixed form: 119/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/28+28/21 16/28+56/21 16/56+28/21 16/28+28/42 48/28+28/21 16/28+84/21 16/84+28/21 16/28+28/63 80/28+28/21