Percent Problems and Proportions

This video tutorial builds on the previous lesson about percent proportions, using the formula 'is over of equals percent over 100'. The teacher reviews basic concepts and demonstrates solving word problems with this formula. The lesson progresses from simple to more complex problems, emphasizing the importance of identifying the 'whole' and 'part' in each scenario. The tutorial concludes with practical examples, reinforcing the application of the formula in real-world contexts.

What is the formula used for solving percent proportion problems?

• of over is equals 100 over percent

• percent equals is times of

• is equals of times percent

• is over of equals percent over 100

In the formula 'is over of equals percent over 100', what does 'is' represent?

• The number 100

• The part of the whole

• The percentage

• The whole amount

If 50 is 20% of a number, what is that number?

• 250

• 200

• 100

• 300

What percent of 20 is 4?

• 15%

• 20%

• 10%

• 25%

What number is 70% of 250?

• 225

• 150

• 175

• 200

10 is 5% of what number?

• 100

• 250

• 200

• 150

What number is 45% of 180?

• 81

• 75

• 70

• 85

40% of what number is 82?

• 180

• 200

• 205

• 210

What percent of 90 is 36?

• 30%

• 35%

• 40%

• 45%

60 is 25% of what number?

• 200

• 220

• 240

• 260