Add 42/45 and 70/18
1st number: 42/45, 2nd number: 3 16/18
42/45 + 70/18 is 217/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
42/45 = 42 × 2/45 × 2 = 84/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
70/18 = 70 × 5/18 × 5 = 350/90 - Add the two like fractions:
84/90 + 350/90 = 84 + 350/90 = 434/90 - 434/90 simplified gives 217/45
- So, 42/45 + 70/18 = 217/45
In mixed form: 437/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/45+70/18 42/90+70/18 42/45+70/36 42/45+70/54 42/45+70/90