Add 42/70 and 75/18
1st number: 42/70, 2nd number: 4 3/18
42/70 + 75/18 is 143/30.
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,
42/70 = 42 × 9/70 × 9 = 378/630 - Likewise, for the 2nd fraction, since 18 × 35 = 630,
75/18 = 75 × 35/18 × 35 = 2625/630 - Add the two like fractions:
378/630 + 2625/630 = 378 + 2625/630 = 3003/630 - 3003/630 simplified gives 143/30
- So, 42/70 + 75/18 = 143/30
In mixed form: 423/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/70+75/18 42/70+75/36 42/70+75/54 42/70+75/90