3. Uncle Gino's Pizza Parlor sold 200 sausage
pizzas last week. That was 80% of the total
pizzas they sold. How many total pizzas
did they sell last week?
4. The local pet store received a shipment
of tropical fish. Seventy-five percent of
the tropical fish were clownfish. If the
shipment included 60 clownfish, how many
total tropical fish were in the shipment?
5. In a survey of favorite pets, 45 students
said they preferred cats. This was 30% of
the total number of students surveyed.
How many students took the survey?
6. Kara has downloaded 250 megabytes of
a file onto her computer. The screen tells
her that this is 25% of the total file. How
many megabytes is the file?

3. Uncle Gino's Pizza Parlor sold 200 sausage pizzas last week. That was 80% of the total pizzas they sold. How many total pizzas did they sell last week?

Given,

Pizzas sold last week = 200

This represents 80% of total pizzas sold.

Let,

x be the total pizzas sold.

80% of x = 200

[tex]\frac{80}{100}x=200\\0.8x=200[/tex]

Dividing both sides by 0.8

[tex]\frac{0.8x}{0.8}=\frac{200}{0.8}\\x=250[/tex]

They sold 250 pizzas last week.

4. The local pet store received a shipment of tropical fish. Seventy-five percent of the tropical fish were clown-fish. If the shipment included 60 clown-fish, how many total tropical fish were in the shipment?

Given,

Number of clown-fish in shipment = 60

This represents 75% of total shipment.

Let x be the total number of fish in shipment.

75% of x = 60

[tex]\frac{75}{100}x=60\\0.75x=60[/tex]

Dividing both sides by 0.75

[tex]\frac{0.75x}{0.75}=\frac{60}{0.75}\\x=80[/tex]

There are 80 tropical fish in the shipment.

5. In a survey of favorite pets, 45 students said they preferred cats. This was 30% of the total number of students surveyed. How many students took the survey?

Given,

Number of students who preferred cats = 45

This represents 30% of total students surveyed.

Let, x be the number of total students surveyed.

30% of x = 45

[tex]\frac{30}{100}x=45\\0.3x=45[/tex]

Dividing both sides by 0.3

[tex]\frac{0.3x}{0.3}=\frac{45}{0.3}\\ x=150[/tex]

150 students were surveyed.

6. Kara has downloaded 250 megabytes of a file onto her computer. The screen tells her that this is 25% of the total file. How many megabytes is the file?

Given,

File downloaded = 250 MB

This represents the 25% of total size of file.

Let, x be the total size of file.

25% of x = 250

[tex]\frac{25}{100}x=250\\0.25x=250\\[/tex]

Dividing both sides by 0.25

[tex]\frac{0.25x}{0.25}=\frac{250}{0.25}\\x=1000[/tex]

The total size of file is 1000 megabytes.

Keywords: percentage, division

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