Add 15/35 and 20/18, Solve 15/35 + 1 2/18 as a fraction

Add 15/35 and 20/18

1^st number: 15/35, 2^nd number: 1 2/18

15/35 + 20/18 is 97/63.

Find the least common denominator or LCM of the two denominators:
LCM of 35 and 18 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 35 × 18 = 630,
15/35 = 15 × 18/35 × 18 = 270/630
Likewise, for the 2nd fraction, since 18 × 35 = 630,
20/18 = 20 × 35/18 × 35 = 700/630
Add the two like fractions:
270/630 + 700/630 = 270 + 700/630 = 970/630
970/630 simplified gives 97/63
So, 15/35 + 20/18 = 97/63
In mixed form: 134/63

MathStep (Works offline)

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