Add 10/70 and 21/18
1st number: 10/70, 2nd number: 1 3/18
10/70 + 21/18 is 55/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 18 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
10/70 = 10 × 9/70 × 9 = 90/630 - Likewise, for the 2nd fraction, since 18 × 35 = 630,
21/18 = 21 × 35/18 × 35 = 735/630 - Add the two like fractions:
90/630 + 735/630 = 90 + 735/630 = 825/630 - 825/630 simplified gives 55/42
- So, 10/70 + 21/18 = 55/42
In mixed form: 113/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/70+21/18 10/70+42/18 10/70+21/36 30/70+21/18 10/70+63/18 10/70+21/54 50/70+21/18 10/70+21/90