Equivalent Rates
Are 4/5 and 20/25 equivalent rates? Explain.
Yes, they both equal 4/5
$18 in 3 hours
$6 per hour
9 triangles to 15 circles
3 triangles to 5 circles
What is a ratio?
A ratio is a comparison of two numbers by division.
Find 122% of 3.
3.66
Are the two rates equivalent? Explain.
$6 in 2 hours and $24 in 6 hours.
No, the unit rates are different.
90 feet in 15 seconds
6 ft per sec
16 of 30 students are boys
8 boys : 15 students
What is a rate?
A rate is a ratio that usually involves a period of time.
Find 20% of 68.
13.6
Are the two rates equivalent? Explain. $420 in 2 hours and $630 in 3 hours
Yes, the unit rates are the same: $210 per hour
238 students in 14 classes
17 students per class
120 cats : 150 dogs
4 cats : 5 dogs
How do you find an equivalent ratio?
Multiply or divide the numerator and denominator of a ratio by the same number.
Find 45% of 33.
14.85
Are 990/1000 and 490/500 equivalent rates? Explain.
No, the simplified rates are not equal.
1,100 feet in 55 seconds
20 ft per sec
A set of DVD’s has 16 action, 20 comedy, and 6 drama. What is the SIMPLIFIED ratio of comedy to the total number of DVD’s?
10 comedy to 21 total DVD’s
What is a unit rate?
A unit rate is a ratio where the denominator is 1.
Find 77% of 325.
250.25
Are the two rates equivalent? Explain.
621 cal. in 3 servings and 828 cal. In 4 servings
Yes, the unit rates are the same: 207 cal. / 1 serving.
560 miles in 21 hours
26.7 mph
240 adults : 504 kids
10 adults : 21 kids
What does percent mean?
per 100 or
out of 100
15 is 20% of what number?
75