Add 54/9 and 18/72, Solve 6 0/9 + 18/72 as a fraction

Add 54/9 and 18/72

1^st number: 6 0/9, 2^nd number: 18/72

54/9 + 18/72 is 25/4.

Find the least common denominator or LCM of the two denominators:
LCM of 9 and 72 is 72

Next, find the equivalent fraction of both fractional numbers with denominator 72
For the 1st fraction, since 9 × 8 = 72,
54/9 = 54 × 8/9 × 8 = 432/72
Likewise, for the 2nd fraction, since 72 × 1 = 72,
18/72 = 18 × 1/72 × 1 = 18/72
Add the two like fractions:
432/72 + 18/72 = 432 + 18/72 = 450/72
450/72 simplified gives 25/4
So, 54/9 + 18/72 = 25/4
In mixed form: 61/4

MathStep (Works offline)

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