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SAT Prep

Category - Math

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Olivia wanted to buy shoes priced at $90. In the meantime the price increased by 10%, and after a while decreased by 10%. What is the price of the shoes now?

$90
$99
$81
$89.10
$90.90

Explanation

Answer: D - The price of the shoes now is $89.10. First calculate 10% of $90.
10%×90 = 10/100×90 = 900/100 = 9

The new price is $90 + $9 = $99.

Now calculate 10% of $99.
10%×99 = 10/100×99 = 990/100 = 9.9

The new price is $99 - $9.9 = $89.10, which is the current price.

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