Add 30/70 and 9/18
30/70 + 9/18 is 13/14.
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,
30/70 = 30 × 9/70 × 9 = 270/630 - Likewise, for the 2nd fraction, since 18 × 35 = 630,
9/18 = 9 × 35/18 × 35 = 315/630 - Add the two like fractions:
270/630 + 315/630 = 270 + 315/630 = 585/630 - 585/630 simplified gives 13/14
- So, 30/70 + 9/18 = 13/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/70+9/18 30/70+9/36 90/70+9/18 30/70+27/18 30/70+9/54 30/70+45/18 30/70+9/90 30/70+63/18