If that's the case... why do I get a different result?

4000 / 7135 * 100
(4000 / 7135) * 100 = 56.06
4000 / (7135 * 100) = 0.005606
BUT
(4000 * 100) / 7135 = 56.06

Personally, I like to include the parenthesis, that way there is no question as to the order of operations.

-tg