So here's PEMDAS:
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction
So we will complete this equation in that order. So first is solving the problem within the parenthesis:
(12) ÷ 4 · 7 - 4² ÷ 4 =?
Then we solve all the parts including an exponent:
12 ÷ 4 · 7 - 16 ÷ 4 = ?
Next, we solve the parts with multiplication:
12 ÷ 28 - 16 ÷ 4 = ?
Then, we solve for all the division:
0.43 - 4 = ?
If there was any addition we would do that next, but because there is none, we move onto subtraction:
0.43 - 4 = -3.57
So, your answer is -3.57
