Scenario: Class Voting - Analyze election results and survey data!
In a class of 40 students, 18 students voted for Candidate A. What percentage of the class voted for Candidate A?
Percentage Formula: Percentage = (Part ÷ Whole) × 100%
Step 1: Identify the part and whole
Part = 18 students (voted for A), Whole = 40 students (total class)
Step 2: Calculate the ratio as a decimal
18 ÷ 40 = 0.45
Step 3: Convert to percentage
0.45 × 100% = 45%
Answer: 45% of the class voted for Candidate A.
If the entire school has 800 students and the same voting pattern continues, how many students would vote for Candidate A?
Solution: 800 students × 45% = 800 × 0.45 = 360 students
We predict that 360 students in the entire school would vote for Candidate A.
What percentage is 25 out of 80?
Solution: (25 ÷ 80) × 100% = 0.3125 × 100% = 31.25%
What is 15% of 60?
Solution: 60 × 15% = 60 × 0.15 = 9
In a survey of 200 people, 120 people said they like pizza. What percentage of people like pizza?
Your calculation:
If 30% of a class of 50 students are boys, how many boys are in the class?
Your calculation: