Add 30/5 and 21/28
1st number: 6 0/5, 2nd number: 21/28
30/5 + 21/28 is 27/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 5 × 28 = 140,
30/5 = 30 × 28/5 × 28 = 840/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
21/28 = 21 × 5/28 × 5 = 105/140 - Add the two like fractions:
840/140 + 105/140 = 840 + 105/140 = 945/140 - 945/140 simplified gives 27/4
- So, 30/5 + 21/28 = 27/4
In mixed form: 63/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/5+21/28 30/5+42/28 30/10+21/28 30/5+21/56 90/5+21/28 30/5+63/28 30/15+21/28 30/5+21/84 30/25+21/28 30/35+21/28