Question

Percent quiz
(((look below)))

Answer 1

Amir’s coin collection consisted of 150 coins in November. By the following June, his collection had grown to 174 coins. By how much did his collection increase between November and June?
a.) 9%
b.)14%
c.) 16%
d.) 24%

Answer 2

The cost per minute for a conference phone call, originally $2.60, increased by 30%. What is the new price?
a.) $2.90
b.) $3.20
c.) $3.38
d.) $3.48

Answer 3

Selena buys several shares of stock at $32 per share and sells them at $28.32 per share. What is the percent of decrease in the price of the stock?
a.) 12.0%
b.) 11.5%
c.) 11.0%
d.) 10.5%

Answer 4

Jack earned $972 in 6 years on an investment at a 3% annual simple interest rate. How much was Jack’s investment?
a.) $174.96
b.) $486
c.) $1944
d.) $5400

Answer 5

A $6000 investment earns $690 annual simple interest in one year. What is the annual interest rate?
a.) 10.5%
b.) 11%
c.) 11.5%
d.) 12%

Answer 6

1. (174 - 150) / 150 = 24/150 = 0.16 = 16%

2. .30(2.60) + 2.60 = 0.78 + 2.60 = $3.38

3. (32 - 28.32) / 32 = 3.68/32 = 0.115 = 11.5%

4. I = PRT
972 = P(.03)(6)
972 = .18P
972/.18 = P
5400 = P

5. I = PRT
690 = 6000(r)(1)
690 = 6000r
690/6000 = r
.115 = r
11.5% = r

Answer 7

thank you again!!! ;D

Answer 8

happy to help......do you have any questions ?

Answer 9

part over whole times 100 = %
Part/whole times 100 = %
Try to think of it that way.
example: Jane ate 3 pieces of a 12 piece pizza. What percentage of the pizza did Jane eat?
(3/12) times 100 = 25%