Quiz about Writing Percent Proportions

Question 1

In the Central City Grand Prix, out of 30 cars that started the race, 12 of them finished. What percent of the cars finished the race?

Accepted Answer

$$12=30x$$

Answer

$$30\cdot12=x$$

Answer

$$30=12x$$

Answer

$$\frac{30}{12}=x$$

Question 2

Determine if you are finding the part, percent, or whole.
12 is 50% of what number?

Accepted Answer

Whole

Answer

Part

Answer

Percent

Question 3

The percent equation is ________

Accepted Answer

part = percent x whole

Answer

whole = part x percent

Answer

part = percent / whole

Question 4

A music collector has 1200 CDs, and 65% of them were produced after 1990. How many of the CDS were produced after 1990?

Accepted Answer

$$x=0.65\cdot1200$$

Answer

$$x=6.5\cdot1200$$

Answer

$$6.5=12x$$

Answer

$$65=12x$$

Question 5

King Hangry is eating a 50 gram chocolate bar which contains 30% cocoa. How many grams of cocoa are in the chocolate bar?

Accepted Answer

$$x=.3\cdot50$$

Answer

$$50x=30$$

Answer

$$50x=.3$$

Answer

$$50=.3x$$

Question 6

5 student in class want to have extra homework. If 20% of the student want extra homework, how many total students are in the class?

Accepted Answer

$$5=.2x$$

Answer

$$20x=5$$

Answer

$$x=.2\cdot5$$

Answer

$$20=5x$$

Question 7

Your friend paid $17 for a shirt. This amount was 85% of the total amount your friend spent while shopping. How much money did your friend spend?

Accepted Answer

$$17=.85x$$

Answer

$$85=17x$$

Answer

$$x=.85\cdot17$$

Answer

$$17=85x$$

Question 8

4. There are 60 girls and 90 boys in the sixth grade at a middle school. Of these students, 3 girls and 9 boys write left-handed. What percentage of the sixth graders at this middle school write left-handed?

Accepted Answer

$$12=150x$$

Answer

$$9=90x$$

Answer

$$60=3x$$

Answer

$$150=12x$$

Question 9

Bill is in a class of 15 boys and 35 girls. 40% of the students in the class take the bus to school. How many students do not take the bus to school?

Accepted Answer

$$x=.4\cdot50$$

Answer

$$15=.6x$$

Answer

$$x=.6\cdot50$$

Answer

$$15=.4x$$

Question 10

A book collector has 1500 books, and 70% of them were published after 2000. How many of the books were published after 2000?

Accepted Answer

$$x=.7\cdot1500$$

Answer

$$1500=.7x$$

Answer

$$.7x=1500$$

Answer

$$70=1500x$$

Question 11

While waiting for a video game to download, you notice that 30% of 32,000 kilobytes have been downloaded so far. How many kilobytes have been downloaded so far?

Accepted Answer

$$x=.3\cdot32000$$

Answer

$$32000=.3x$$

Answer

$$32000=30x$$

Answer

$$30=3200x$$

Question 12

King Hangry is enjoying a 60 gram chocolate bar which contains 25% cocoa. How many grams of cocoa are in the chocolate bar?

Accepted Answer

$$x=.25\cdot60$$

Answer

$$25=60x$$

Answer

$$60=25x$$

Answer

$$60=.25x$$

Question 13

In the United States, 13 out of every 20 cans are recycled. What percent of cans are recycled?

Accepted Answer

$$13=20x$$

Answer

$$x=.2\cdot13$$

Answer

$$x=13\cdot20$$

Answer

$$20=13x$$

Question 14

Of the 60 students in the seventh grade, 70% own a pet. How many of the seventh grade students own a pet?

Accepted Answer

$$x=.7\cdot60$$

Answer

$$.7=60x$$

Answer

$$60=.7x$$

Answer

$$7=60x$$

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