Ratios and Rates
A ratio compares 2 quantities using _______.
division
Proportions are an ___________ that compare two different ratios.
equation
To covert a decimal to a percent, move the decimal over ____ places to the ____.
2; right
Probability can be expressed as a _____, _____, or _____.
fraction; decimal; percent
When solving a percent proportion, what is always in the denominator of the percent ratio?
100
What are the three ways you can express a ratio?
a to b, a/b, a:b
What strategy can you use to solve a proportion?
cross multiplication
When converting a fraction to a decimal, what goes in the numerator? What goes in the denominator?
If the probability of an event occurring is "impossible", what percent chance is that? What about if an event is "certain"?
0%, 100%
When calculating percent change, what value goes in the numerator over the original amount?
the change
What is the denominator of a unit rate?
1
Solve the proportion:
7/a = 2/7
24.5
When writing a percent as a fraction, what always goes in the denominator?
100
What is the probability of rolling a 3 on a standard, 6-sided dice?
1/6 or 16.7%
What is 90% of 40?
36
Write the ratio of a fraction in simplest form:
15 made shots in 35 attempts
3/7
Solve the proportion:
x/2= 10/7
2.86
Convert the fraction into a percent:
79/125
63.2%
What is the probability of rolling a number greater than 2 on a standard, 6-sided dice?
4/6, 2/3, 67%
92% of what is 15?
16.3
How fast were you driving if you made it from here to Missoula (167 miles away) in 2.5 hours?
66.8 miles per hour
The currency in Croatia is the Kuna. The exchange rate is approximately 6 Kuna for $1. At this rate, how many dollars would you get if you exchanged 24 Kuna?
$4
Convert the decimal to a fraction in simplest form:
.875
7/8
There are 30 marbles in a bag. 8 are red, 10 are blue, 2 are yellow, 5 are green, and 5 are purple. What is the probability that you pull a yellow or a blue marble out of the bag?
12/30, 6/15, 2/5, 40%
If the original price for a nice pair of pants is $62.50, what is the price after a 20% discount? What about after a 3% tax?
$50
$64.38