Ratios, Rates, & Conversions
Solving Proportions
Proportions & Similar Figures
Percents
Percent of Change
100
47 yards: ___ inches
1692 inches
100
9/2 = x/7
x = 31.5
100
How tall is the tree?
44 ft
100
20% of 80 is _____
16
100
Does the percent have an increase or decrease? Then find the percent change.
Original Amount: 9
New Amount: 6
Decrease; 33%
200
4978 meters: ____ kilometers
4.98 kilometers
200
-9/x = 5/6
x = -10.8
200
x = 3
200
120 is 200% of _______
60
200
Does the percent have an increase or decrease? Then find the percent change.
Original Amount: 40.2
New Amount: 38.6
Decrease; 4%
300
17 quarts/ minute: ____ gallons/ hour
255 gallons/ hour
300
3/7 = (x+4)/35
x = 11
300
x = 12
300
What percent of 8 is 300?
1250%
300
Does the percent have an increase or decrease? Then find the percent change.
Original Amount: 195.50
New Amount: 215.25
Increase; 10%
400
300 miles/ hour: ___ meters/ minute
8047 meters/ minute
400
DOUBLE JEOPARDY
x = 3.62
400
Find x and y of the following diagram:
x = 2.5
y = 6.5
400
What is 20% of 3?
0.6
400
You predicted that the Statue of Liberty was 353 feet tall. The statue is actually 305 feet tall.
Find the Percent Error (Round to the nearest percent)
16%
500
Mike made a cross country road trip from Des Moines to L.A. for the Superbowl. The journey was 1,682 miles and it took him 2 days total to complete.
Assuming Mike never stopped driving, what was his average speed in Kilometers per hour?
58.40 kilometers / hour
500
(x+2)/5 = (2x - 11) / 7
23
500
A grain silo casts a shadow of 40 feet while a nearby fence post casts a shadow of 2 feet. The fence post is 5 feet high. How tall is the grain silo?
100 ft
500
A rare disease has been discovered that affects 2 out of every 10,000 trees in a forest. What percent of trees are affected?
0.02%
500
Your friend told you he got a new car and you assumed the car cost around $30,000. Turns out the car isn't new, just "new to him" and only cost about $3,000.
Find the percent error in the estimation. (Round to the nearest percent)
900%