-6 and -4 are your inputs -2 and 7 are your outputs
So when you have data given this kind of form... you should convert to decimal first.
So that would be:
a ≈ 2.12
b = 3.5
c = 2.5
Now just place the simple perimeter formula, and sum all sides.
Step 1- Set up the equation.
Step 2- Divide the first digit.
Step 3- Divide the first two digits.
Step 4- Enter the first digit of the quotient.
Frac. = 7/200
Dec. = 0.035
For the first one its (A) For the 2nd its (C) For the 3rd its (B)