Add 20/24 and 42/18, Solve 20/24 + 2 6/18 as a fraction

Add 20/24 and 42/18

1^st number: 20/24, 2^nd number: 2 6/18

20/24 + 42/18 is 19/6.

Find the least common denominator or LCM of the two denominators:
LCM of 24 and 18 is 72

Next, find the equivalent fraction of both fractional numbers with denominator 72
For the 1st fraction, since 24 × 3 = 72,
20/24 = 20 × 3/24 × 3 = 60/72
Likewise, for the 2nd fraction, since 18 × 4 = 72,
42/18 = 42 × 4/18 × 4 = 168/72
Add the two like fractions:
60/72 + 168/72 = 60 + 168/72 = 228/72
228/72 simplified gives 19/6
So, 20/24 + 42/18 = 19/6
In mixed form: 31/6

MathStep (Works offline)

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