Add 15/2 and 27/72, Solve 7 1/2 + 27/72 as a fraction

Add 15/2 and 27/72

1^st number: 7 1/2, 2^nd number: 27/72

15/2 + 27/72 is 63/8.

Find the least common denominator or LCM of the two denominators:
LCM of 2 and 72 is 72

Next, find the equivalent fraction of both fractional numbers with denominator 72
For the 1st fraction, since 2 × 36 = 72,
15/2 = 15 × 36/2 × 36 = 540/72
Likewise, for the 2nd fraction, since 72 × 1 = 72,
27/72 = 27 × 1/72 × 1 = 27/72
Add the two like fractions:
540/72 + 27/72 = 540 + 27/72 = 567/72
567/72 simplified gives 63/8
So, 15/2 + 27/72 = 63/8
In mixed form: 77/8

MathStep (Works offline)

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