Add 42/45 and 35/70
42/45 + 35/70 is 43/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
42/45 = 42 × 14/45 × 14 = 588/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
35/70 = 35 × 9/70 × 9 = 315/630 - Add the two like fractions:
588/630 + 315/630 = 588 + 315/630 = 903/630 - 903/630 simplified gives 43/30
- So, 42/45 + 35/70 = 43/30
In mixed form: 113/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/45+35/70 42/90+35/70