Hey!
-------------------------------------------------
Steps To Solve:
~Follow PEMDAS
6.4 − 2.4 ÷ 0.1
~Divide
6.4 − (2.4 ÷ 0.1)
~Simplify
6.4 - 24
~Subtract
(6.4 - 24)
~Simplify
-17.6
-------------------------------------------------
Answer:

-------------------------------------------------
Hope This Helped! Good Luck!