Add 18/70 and 27/18, Solve 18/70 + 1 9/18 as a fraction

Add 18/70 and 27/18

1^st number: 18/70, 2^nd number: 1 9/18

18/70 + 27/18 is 123/70.

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,
18/70 = 18 × 9/70 × 9 = 162/630
Likewise, for the 2nd fraction, since 18 × 35 = 630,
27/18 = 27 × 35/18 × 35 = 945/630
Add the two like fractions:
162/630 + 945/630 = 162 + 945/630 = 1107/630
1107/630 simplified gives 123/70
So, 18/70 + 27/18 = 123/70
In mixed form: 153/70

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad