ACT SAT Prep How to determine the percent of a population

The video tutorial explains how to analyze survey results to determine the percentage of people with no opinion about a senatorial candidate. It covers the calculation process, including subtracting positive and negative opinions from the total, and demonstrates using proportions and cross products to find percentages. The tutorial emphasizes understanding mathematical concepts and provides a step-by-step guide to ensure clarity.

How many people surveyed had no opinion about the senatorial candidate?

• 240

• 120

• 440

• 680

What is the total number of people surveyed in the problem?

• 440

• 680

• 240

• 800

What is the formula used to calculate the percentage of people with no opinion?

• Part plus whole

• Whole over part

• Part over whole

• Whole minus part

What is the percentage of people with no opinion about the candidate?

• 10%

• 15%

• 20%

• 25%

Which method is emphasized for calculating percentages in this lesson?

• Cross-multiplication

• Division

• Subtraction

• Addition