Add 24/72 and 21/12, Solve 24/72 + 1 9/12 as a fraction

Add 24/72 and 21/12

1^st number: 24/72, 2^nd number: 1 9/12

24/72 + 21/12 is 25/12.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 12 is 72

Next, find the equivalent fraction of both fractional numbers with denominator 72
For the 1st fraction, since 72 × 1 = 72,
24/72 = 24 × 1/72 × 1 = 24/72
Likewise, for the 2nd fraction, since 12 × 6 = 72,
21/12 = 21 × 6/12 × 6 = 126/72
Add the two like fractions:
24/72 + 126/72 = 24 + 126/72 = 150/72
150/72 simplified gives 25/12
So, 24/72 + 21/12 = 25/12
In mixed form: 21/12

MathStep (Works offline)

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