What is the difference between
-30.7 and -8.5?

-22.2

well, the system told me that i need a 20 words explanqtion so i'. just typing this down to put in more words but how i solved it, is i used a calculator

bhaskar and multiple deck strategy and multiple deck strategy and multiple deck strategy and multiple deck strategy and multiple deck strategy and multiple deck strategy and multiple deck strategy and multiple deck strategy and multiple deck strategy and multiple deck strategy and multiple deck strategy and multiple deck strategy and multiple deck strategy and multiple deck strategy and multiple deck strategy and multiple deck strategy and multiple police and the rest is fine