Question

I have to integer variables a and b.

I would like to compute the percentage a/b in ruby, considering that if both are zero the result should be zero.

With literals its easy, I just need to add .0 in the numbers: 12.0/17.0, with variables that come from other calculations:

# a == 12 and b == 17    
  a/b => 0

# a == 0 and b == 0    
  a/b => Infinity

Answer 1

You can use a.to_f/b so you convert the integer number in a floating number.
Another trick you can do is something like a*1.0/b, but I think the first solution is better.

Just check the a==0 && b==0 with an if.