1985 AMC 8 Problem 14

Attempt Problem 14 of the 1985 AMC 8 below, then check your answer against the professionally curated solution from LIVE by Po-Shen Loh. You can also try the full timed exam, view all 1985 AMC 8 solutions, or check the answer key.

All problems are used with official legal permission of the Mathematical Association of America (MAA).

14.

The difference between a 6.5%6.5\% sales tax and a 6%6\% sales tax on an item priced at $20\$20 before tax is
$0.01\$0.01
$0.10\$0.10
$0.50\$0.50
$1\$1
$10\$10
Answer: B
Concepts:percentage
Small hint:
The difference in tax rates is 6.5%−6%=0.5%6.5\% - 6\% = 0.5\%
Big hint:
Find 0.5%0.5\% of $20\$20
Solution:
The two taxes differ by 0.5%0.5\% of the price.
That is 0.005×$20=$0.10.0.005 \times \$20 = \$0.10.
Thus, the correct answer is B .
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