Add 20/70 and 3/18
20/70 + 3/18 is 19/42.
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,
20/70 = 20 × 9/70 × 9 = 180/630 - Likewise, for the 2nd fraction, since 18 × 35 = 630,
3/18 = 3 × 35/18 × 35 = 105/630 - Add the two like fractions:
180/630 + 105/630 = 180 + 105/630 = 285/630 - 285/630 simplified gives 19/42
- So, 20/70 + 3/18 = 19/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/70+3/18 20/70+6/18 20/70+3/36 60/70+3/18 20/70+9/18 20/70+3/54 20/70+15/18 20/70+3/90 20/70+21/18