Mathematics 1202
Percentages of Increase and Decrease
Complete all work on this paper. Be sure to show ALL workings.
1. Determine the percentage of increase or decrease as indicated.
2.
Original
Amount
New Amount
$56
$70
$50
$35
8g
14 g
60ml
39ml
50 L
51L
$45
$18
30kg
51kg
% of Increase or Decrease
For each problem, find the percent of change and write if it is increase or
decrease:
a)
$10.00 changed to $7.75
b)
$30.00 changed to $34.50
c)
$7.50 changed to $5.85
d)
$4.45 changed to $6.23
e)
$100.00 changed to $75.00
f)
$5.00 changed to $8.40
g)
$28.50 changed to $37.62
h)
$40.00 changed to $50.00
i)
$4.75 to $4.15
j)
$28.75 changed to $44.85
3.
Adams Clothing Store buys coats for $50 and then sells them for $80. What is the
percent of increase on the price of the coat?
4.
In 1967, a 30-second Super Bowl commercial cost $40,000. In 2000, a 30-second
commercial cost $1,800,000. What was the percent of change in the cost of a
commercial?
5.
Jenni, an employee of Hollister, bought a sweater originally priced at $55 for $38.50
after her employee discount. What percent decrease is the employee discount ?
6.
Colin got a raise from $6.00 an hour to $8.00 an hour. This was a raise of what percent?
7.
In 1990, the population of a town was 72,000. In 2000, the population had risen to
119,160. Find the percentage increase of the population.