Percent Word Problems: Finding the Whole Number

What percentage of the total penguins are emperor penguins?

• 30%

• 70%

• 15%

• 50%

If 15 emperor penguins make up 30% of the total penguins, what is the equation to find the total number of penguins?

• 0.30x = 15

• x/0.30 = 15

• 15x = 0.30

• x = 15/0.30

How do you convert 30% to a decimal?

• 3.0

• 30.0

• 0.3

• 0.03

What is the next step after forming the equation 0.30x = 15?

• Subtract 0.30 from both sides

• Multiply both sides by 0.30

• Divide both sides by 0.30

• Add 0.30 to both sides

What is the result of 15 divided by 0.30?

• 150

• 5

• 30

• 50

How do you verify the solution of 0.30x = 15?

• Multiply 0.30 by 50

• Divide 0.30 by 50

• Add 0.30 to 50

• Subtract 0.30 from 50

What is another way to represent 30%?

• 30 per 10

• 30 per 100

• 30 per 1000

• 30 per 10000

How do you simplify the fraction 15/50?

• Multiply both numerator and denominator by 10

• Divide both numerator and denominator by 3

• Divide both numerator and denominator by 5

• Multiply both numerator and denominator by 2

What is the simplified form of 15/50?

• 1/3

• 3/5

• 1/2

• 3/10

What is the total number of penguins in the zoo?

• 15

• 30

• 50

• 100