Add 40/70 and 6/18
40/70 + 6/18 is 19/21.
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,
40/70 = 40 × 9/70 × 9 = 360/630 - Likewise, for the 2nd fraction, since 18 × 35 = 630,
6/18 = 6 × 35/18 × 35 = 210/630 - Add the two like fractions:
360/630 + 210/630 = 360 + 210/630 = 570/630 - 570/630 simplified gives 19/21
- So, 40/70 + 6/18 = 19/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/70+6/18 40/70+12/18 40/70+6/36 40/70+6/54 40/70+30/18 40/70+6/90 40/70+42/18