Add 21/35 and 70/18
1st number: 21/35, 2nd number: 3 16/18
21/35 + 70/18 is 202/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 18 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 35 × 18 = 630,
21/35 = 21 × 18/35 × 18 = 378/630 - Likewise, for the 2nd fraction, since 18 × 35 = 630,
70/18 = 70 × 35/18 × 35 = 2450/630 - Add the two like fractions:
378/630 + 2450/630 = 378 + 2450/630 = 2828/630 - 2828/630 simplified gives 202/45
- So, 21/35 + 70/18 = 202/45
In mixed form: 422/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/35+70/18 21/70+70/18 21/35+70/36 63/35+70/18 21/35+70/54 21/35+70/90