Add 20/6 and 18/90, Solve 3 2/6 + 18/90 as a fraction

Add 20/6 and 18/90

1^st number: 3 2/6, 2^nd number: 18/90

20/6 + 18/90 is 53/15.

Find the least common denominator or LCM of the two denominators:
LCM of 6 and 90 is 90

Next, find the equivalent fraction of both fractional numbers with denominator 90
For the 1st fraction, since 6 × 15 = 90,
20/6 = 20 × 15/6 × 15 = 300/90
Likewise, for the 2nd fraction, since 90 × 1 = 90,
18/90 = 18 × 1/90 × 1 = 18/90
Add the two like fractions:
300/90 + 18/90 = 300 + 18/90 = 318/90
318/90 simplified gives 53/15
So, 20/6 + 18/90 = 53/15
In mixed form: 38/15

MathStep (Works offline)

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