Final answer:
To evaluate the given expression, perform the addition and subtraction first, following the order of operations (PEMDAS). Simplify the expression inside the brackets, and then perform the remaining subtraction. The final result is 93.11 as a decimal.
Step-by-step explanation:
To evaluate the given expression, we need to follow the order of operations (PEMDAS).
First, perform the addition and subtraction from left to right:
(99 - 0.96 + (-4.7)) - [-8.63 + ((-6.6) - (-15))]
= (99 - 0.96 - 4.7) - [-8.63 + (-6.6 + 15)]
= (99 - 5.66) - [-8.63 + 8.4]
= 93.34 - [-0.23]
Next, simplify the expression inside the brackets:
= 93.34 - 0.23
= 93.11
The final result is 93.11 as a decimal.