Add 28/70 and 50/21
1st number: 28/70, 2nd number: 2 8/21
28/70 + 50/21 is 292/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
28/70 = 28 × 3/70 × 3 = 84/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
50/21 = 50 × 10/21 × 10 = 500/210 - Add the two like fractions:
84/210 + 500/210 = 84 + 500/210 = 584/210 - 584/210 simplified gives 292/105
- So, 28/70 + 50/21 = 292/105
In mixed form: 282/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/70+50/21 28/70+50/42 84/70+50/21 28/70+50/63