Add 1/72 and 60/21, Solve 1/72 + 2 18/21 as a fraction

Add 1/72 and 60/21

1^st number: 1/72, 2^nd number: 2 18/21

1/72 + 60/21 is 1447/504.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 21 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 72 × 7 = 504,
1/72 = 1 × 7/72 × 7 = 7/504
Likewise, for the 2nd fraction, since 21 × 24 = 504,
60/21 = 60 × 24/21 × 24 = 1440/504
Add the two like fractions:
7/504 + 1440/504 = 7 + 1440/504 = 1447/504
So, 1/72 + 60/21 = 1447/504
In mixed form: 2439/504

MathStep (Works offline)

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