Percentage

Advanced Math 5 · Unit 15 · percent-financial-intro · Teacher edition

percent-financial-intro

Name ______________________________Date ______________

1.
Find $15\%$ of $60$ .
Answer: ______________
2.
A jacket is priced at $60. It is on sale for $25\%$ off, and then $6\%$ sales tax is added to the sale price. What is the final price, in dollars?
Answer: ______________
3.
A bus ticket costs $80. The price is increased by $5\%$ . What is the new price?
1. (A)
  $85
2. (B)
  $88
3. (C)
  $4
4. (D)
  $84

Answer key — Percentage

1.
9percent-financial-intro-01
$10\%$ of $60$ is $6$ and $5\%$ is $3$ , so $15\%$ is $6 + 3 = \mathbf{9}$ . (Or $0.15 \times 60 = 9$ .)
2.
47.7percent-financial-intro-02
Sale price $= 60 - 15 = 45$ . Tax $= 0.06 \times 45 = 2.70$ . Final price $= 45 + 2.70 = \mathbf{47.70}$ dollars. (Tax on the original $60 would be $3.60 and give a wrong total of $48.60.)
3.
(D)
$84
percent-financial-intro-03
$5\%$ of $80 = 4$ , so the new price is $80 + 4 = 84$ dollars: $84. ($85 adds $5$ instead of $5\%$ ; $4 is only the increase; $88 is a $10\%$ increase.)