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You work as a sales clerk at a fashion boutique. The store is having a 20 percent off everything sale. Additionally, your manager wants you to mark down a stack of jeans from the sale price by 20 percent more. The original cost of the jeans is $30.00, and you calculate the final sale price to be $18.00.

Your Calculation:

30.00 × [1 − (0.20 + 0.20)]
30.00 × 0.60
18.00

Is there a mistake in the calculation? If so, Identify the mistake.
A) yes, added 20% offs
B) yes, a subtraction mistake
C) yes, a multiplication mistake
D) no mistake, the calculation is correct
E) yes, a decimal placement error

Respuesta :

Your answer is D.


The jeans are 40% off (because you add 20% more).

And the original cost of the jeans is $30.


You could have done:

30 · 0.40 = 12  (Find 40% of $30, then subtract 30 by 40% of 30 to get the new sale price]

30 - 12 = 18


1 - 0.40 = 0.60  (You subtract 1 by 0.40 to get 0.60, which is the % of the original price that you have to pay)

30 · 0.60 = 18

Answer:

A.)yes, added 20% offs

Step-by-step explanation: