Add 98/18 and 18/72, Solve 5 8/18 + 18/72 as a fraction

Add 98/18 and 18/72

1^st number: 5 8/18, 2^nd number: 18/72

98/18 + 18/72 is 205/36.

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

Next, find the equivalent fraction of both fractional numbers with denominator 72
For the 1st fraction, since 18 × 4 = 72,
98/18 = 98 × 4/18 × 4 = 392/72
Likewise, for the 2nd fraction, since 72 × 1 = 72,
18/72 = 18 × 1/72 × 1 = 18/72
Add the two like fractions:
392/72 + 18/72 = 392 + 18/72 = 410/72
410/72 simplified gives 205/36
So, 98/18 + 18/72 = 205/36
In mixed form: 525/36

MathStep (Works offline)

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