Add 5/30 and 30/21
1st number: 5/30, 2nd number: 1 9/21
5/30 + 30/21 is 67/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
5/30 = 5 × 7/30 × 7 = 35/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
30/21 = 30 × 10/21 × 10 = 300/210 - Add the two like fractions:
35/210 + 300/210 = 35 + 300/210 = 335/210 - 335/210 simplified gives 67/42
- So, 5/30 + 30/21 = 67/42
In mixed form: 125/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/30+30/21 5/30+60/21 5/60+30/21 5/30+30/42 15/30+30/21 5/30+90/21 5/90+30/21 5/30+30/63 25/30+30/21 35/30+30/21