Add 80/4 and 21/18, Solve 20 0/4 + 1 3/18 as a fraction

Add 80/4 and 21/18

1^st number: 20 0/4, 2^nd number: 1 3/18

80/4 + 21/18 is 127/6.

Find the least common denominator or LCM of the two denominators:
LCM of 4 and 18 is 36

Next, find the equivalent fraction of both fractional numbers with denominator 36
For the 1st fraction, since 4 × 9 = 36,
80/4 = 80 × 9/4 × 9 = 720/36
Likewise, for the 2nd fraction, since 18 × 2 = 36,
21/18 = 21 × 2/18 × 2 = 42/36
Add the two like fractions:
720/36 + 42/36 = 720 + 42/36 = 762/36
762/36 simplified gives 127/6
So, 80/4 + 21/18 = 127/6
In mixed form: 211/6

MathStep (Works offline)

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