Question: A health study shows that 25% of participants are smokers. If there are 200 participants, how many are non-smokers?
Options:
150
160
175
180
Correct Answer: 150
Solution:
Number of smokers = 200 * 0.25 = 50. Non-smokers = 200 - 50 = 150.
A health study shows that 25% of participants are smokers. If there are 200 part
Practice Questions
Q1
A health study shows that 25% of participants are smokers. If there are 200 participants, how many are non-smokers?
150
160
175
180
Questions & Step-by-Step Solutions
A health study shows that 25% of participants are smokers. If there are 200 participants, how many are non-smokers?
Step 1: Understand that 25% of the participants are smokers.
Step 2: Convert the percentage to a decimal. 25% is the same as 0.25.
Step 3: Multiply the total number of participants (200) by the decimal (0.25) to find the number of smokers: 200 * 0.25 = 50.
Step 4: Subtract the number of smokers from the total number of participants to find the number of non-smokers: 200 - 50 = 150.
Percentage Calculation – Understanding how to calculate a percentage of a total and apply it to find a subset of a population.
Subtraction for Complement – Using subtraction to find the complement of a group (non-smokers in this case) after determining the size of one subset (smokers).
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