Answer: 550
Explanation:
For this you will have to use PEMDAS. It stands for Parenthesis, exponents, multiplication, division, addition, and subtraction. You start at P and work your way down to S according to the problem.
Start with parenthesis -500 x (90/100) +1000
ninety divided by one hundred is 0.9
The problem is now
-500 x 0.9 +1000
No exponents so now multiply
-500 x 0.9=-450
then it is -450 +1000
Now you can add to get 550