Add 42/9 and 20/70
1st number: 4 6/9, 2nd number: 20/70
42/9 + 20/70 is 104/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 9 × 70 = 630,
42/9 = 42 × 70/9 × 70 = 2940/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
20/70 = 20 × 9/70 × 9 = 180/630 - Add the two like fractions:
2940/630 + 180/630 = 2940 + 180/630 = 3120/630 - 3120/630 simplified gives 104/21
- So, 42/9 + 20/70 = 104/21
In mixed form: 420/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/9+20/70 42/9+40/70 42/18+20/70 42/9+60/70 42/27+20/70 42/45+20/70 42/63+20/70