Add 21/5 and 18/35
1st number: 4 1/5, 2nd number: 18/35
21/5 + 18/35 is 33/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 35 is 35
Next, find the equivalent fraction of both fractional numbers with denominator 35 - For the 1st fraction, since 5 × 7 = 35,
21/5 = 21 × 7/5 × 7 = 147/35 - Likewise, for the 2nd fraction, since 35 × 1 = 35,
18/35 = 18 × 1/35 × 1 = 18/35 - Add the two like fractions:
147/35 + 18/35 = 147 + 18/35 = 165/35 - 165/35 simplified gives 33/7
- So, 21/5 + 18/35 = 33/7
In mixed form: 45/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/5+18/35 21/5+36/35 21/10+18/35 21/5+18/70 63/5+18/35 21/5+54/35 21/15+18/35 21/5+90/35 21/25+18/35 21/35+18/35