Exploring Proportions and Equations

The video tutorial covers percent proportions and equations. It begins with setting up notes for Unit 11 on percents. The teacher explains how to use proportions to solve problems involving percents, parts, and wholes, with examples. The second part focuses on percent equations, emphasizing the conversion of percents to decimals before solving. The video includes practical examples to illustrate each concept.

What should you label the new half sheet for tonight's video?

• Unit 10 Percents

• Unit 11 Percents

• Unit 12 Percents

• Unit 13 Percents

In the proportion formula 'is over of equals percent over 100', where is the variable placed when finding the percent?

• In the numerator above 'is'

• In the numerator above 100

• In the denominator below 100

• In the denominator below 'is'

When solving for the part in a percent proportion, where is the variable placed?

• In the numerator above 100

• In the denominator below 'of'

• In the denominator below 100

• In the numerator above 'of'

What is the first step in solving a proportion problem?

• Divide by the given percent

• Put parentheses around important pieces of information

• Cross multiply and solve for X

• Convert the percent to a decimal

In the example where 19 members are 38% of the ski club, what is the total number of members?

• 38

• 19

• 50

• 100

What is the equation used for percent equations?

• Percent minus of equals is

• Percent divided by of equals is

• Percent times of equals is

• Percent plus of equals is

What must you do to the percent before substituting it into the percent equation?

• Divide it by 100

• Add it to the 'of' value

• Convert it to a decimal

• Multiply it by 100

In the example where 65% of 245 is calculated, what is the value of 'is'?

• 0.65

• 65

• 245

• 159.25

In the Duke football example, what percent of the games did they win?

• 50%

• 38%

• 71%

• 65%

What is the final step in solving a percent equation problem?

• Round the decimal to the nearest percent

• Cross multiply and solve for X

• Convert the percent to a decimal

• Multiply the percent by the 'of' value