Percentage Calculations and Comparisons

This lesson focuses on comparing quantities using percentages. It introduces two methods: proportion and equation, to solve percent problems. Several examples are provided, including calculating the percentage of bracelets produced, comparing student numbers in different grades, and comparing costs of meals. The lesson emphasizes understanding the part and whole in percent calculations.

What is the equation used to find the part when given the percent and the whole?

• part = whole * 100

• part = whole / percent

• part = percent / whole

• part = percent * whole

If Anna and Emily made 54 bracelets out of a total of 300 needed, what percentage of the bracelets were made?

• 20%

• 18%

• 25%

• 15%

Emily made 22 bracelets while Anna made 32. What percentage of Anna's production is Emily's?

• 68.75%

• 75%

• 80%

• 85%

Anna made 32 bracelets. What percentage of Emily's production is Anna's?

• 155%

• 125%

• 145%

• 150%

If there are 750 students in the seventh grade and 625 in the eighth grade, what percentage is the seventh grade of the eighth grade?

• 125%

• 110%

• 115%

• 120%

Will the principal need to increase the number of eighth-grade teachers if the seventh-grade enrollment exceeds 110% of the current eighth-grade enrollment?

• Yes, because it is 120%

• Yes, because it is 130%

• No, because it is 110%

• No, because it is only 100%

There are 104 students in the band and 80 in the choir. What percentage of the choir is the band?

• 135%

• 120%

• 125%

• 130%

If breakfast costs $1.25 and lunch costs $3.75, what percentage of the lunch cost is the breakfast?

• 40%

• 30%

• 33.3%

• 35%

What should you consider as the 'part' when setting up a percentage problem?

• The percentage itself

• The total amount

• The amount you are comparing to

• The amount you are interested in

What should you consider as the 'whole' when setting up a percentage problem?

• The percentage itself

• The amount you are interested in

• The difference between two amounts

• The total amount