Answer:
The percent decrease of the microwave from the original price to the sale price is 24%
Step-by-step explanation:
1. Let's review the information given to us to answer the question correctly:
Original price of a microwave = $ 75
Mark-up price of the microwave = $ 90
Sale price of the microwave = $ 57
2. What is the percent decrease from the original price to the sale price?
For answering this question we will use the Direct Rule of Three this way:
Price Percentage
75 100%
57 x
75x = 57 * 100
75x = 5,700
x = 5,700/75
x = 76
76 = 100 - 24
The percent decrease of the microwave from the original price to the sale price is 24%
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Work Shown:
Ignore the value 90 as we never use it in this problem.
A = old value = 75
B = new value = 57
C = percent change
C = 100*(B-A)/A
C = 100*(57-75)/75
C = 100*(-18/75)
C = 100(-0.24)
C = -24%
The negative C value indicates a percent decrease.
Going from $75 to $57 is a 24% decrease.
