Add 30/21 and 5/35
1st number: 1 9/21, 2nd number: 5/35
30/21 + 5/35 is 11/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 35 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
30/21 = 30 × 5/21 × 5 = 150/105 - Likewise, for the 2nd fraction, since 35 × 3 = 105,
5/35 = 5 × 3/35 × 3 = 15/105 - Add the two like fractions:
150/105 + 15/105 = 150 + 15/105 = 165/105 - 165/105 simplified gives 11/7
- So, 30/21 + 5/35 = 11/7
In mixed form: 14/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/21+5/35 30/21+10/35 30/42+5/35 30/21+5/70 90/21+5/35 30/21+15/35 30/63+5/35 30/21+25/35