Add 28/21 and 20/6
1st number: 1 7/21, 2nd number: 3 2/6
28/21 + 20/6 is 14/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
28/21 = 28 × 2/21 × 2 = 56/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
20/6 = 20 × 7/6 × 7 = 140/42 - Add the two like fractions:
56/42 + 140/42 = 56 + 140/42 = 196/42 - 196/42 simplified gives 14/3
- So, 28/21 + 20/6 = 14/3
In mixed form: 42/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/21+20/6 28/21+40/6 28/42+20/6 28/21+20/12 84/21+20/6 28/21+60/6 28/63+20/6 28/21+20/18 28/21+20/30 28/21+20/42