Add 42/70 and 56/45
1st number: 42/70, 2nd number: 1 11/45
42/70 + 56/45 is 83/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 45 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 45 × 14 = 630,
56/45 = 56 × 14/45 × 14 = 784/630 - Add the two like fractions:
378/630 + 784/630 = 378 + 784/630 = 1162/630 - 1162/630 simplified gives 83/45
- So, 42/70 + 56/45 = 83/45
In mixed form: 138/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/70+56/45 42/70+56/90