Add 20/70 and 9/18
20/70 + 9/18 is 11/14.
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,
9/18 = 9 × 35/18 × 35 = 315/630 - Add the two like fractions:
180/630 + 315/630 = 180 + 315/630 = 495/630 - 495/630 simplified gives 11/14
- So, 20/70 + 9/18 = 11/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/70+9/18 20/70+9/36 60/70+9/18 20/70+27/18 20/70+9/54 20/70+45/18 20/70+9/90 20/70+63/18