Dividing long by long returns 0 [duplicate]

Answer 1

That will be evaluated left to right, the first integer division will return 0 (e.g. 8/10 evaluates to 0). Either convert values to floats or do 100*a/b. Floats will give you a more precise result.

Answer 2

You are probably dividing a long with a long, which refers to (long/long = long) operation, giving a long result (in your case 0).

You can achieve the same thing by casting either operand of the division to a float type.

Long Percentageused = (long)((float)totaloccupied/totaldrive*100);

Answer 3

You are doing integer division! Since totaloccupied is smaller than totaldrive, the division of both gives the answer 0. You should convert to double first:

double percentageUsed = 100.0 * totalOccupied / totalDrive;

Note that adding the decimal point to the 100 ensures it is treated as a double.