Adam plans to choose a video game from a section of the store where everything is 75%

75

%

off. He writes the expression - 0.75

d

-

0

.

75

d

to find the sale price of the game if the original price is

d

dollars.

Rena correctly writes another expression, 0.25

0

.

25

d

, that will also find the sale price of the game if the original price is

d

dollars.

Use the drop-down menus to explain what each part of Adam's and Rena's expressions mean

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Step-by-step explanation:

In Adam's expression, d represents the original price of the game. 0.75d represents 75% of the original price; this is the amount of the discount, since everything is 75% off. Taking the difference of the original price and the discount, d-0.75d, gives us the total price of the game. In Rena's expression, 0.25 represents 25%. This is because taking 75% off of the price means we still pay 100-75 = 25% of the original price. Multiplying the original price, d, by the 0.25, gives us 25% of the original price; this is the total price.