Lesson 2
Talking Percents
- Let’s explore percentages
2.1: Math Talk: Percents
Evaluate mentally.
50% of 200
25% of 200
6% of 200
3.2% of 200
2.2: Shapes Galore
Use the image to fill in one word or number for each of the blanks. Round each percentage to the nearest whole number.
- \(\underline{\hspace{.5in}}\)of the 13 shapes with dots are circles. \(\underline{\hspace{.5in}}\)% of the shapes with dots are circles.
- 5 of the \(\underline{\hspace{.5in}}\) \(\underline{\hspace{.5in}}\) are white. \(\underline{\hspace{.5in}}\)% of the shapes are white.
- \(\underline{\hspace{.5in}}\)of the \(\underline{\hspace{.5in}}\) shapes are quadrilaterals. \(\underline{\hspace{.5in}}\)% of the shapes are quadrilaterals.
- \(\underline{\hspace{.5in}}\) of the 4 \(\underline{\hspace{.5in}}\) are \(\underline{\hspace{.5in}}\). \(\underline{\hspace{.5in}}\)of the 4 \(\underline{\hspace{.5in}}\) are \(\underline{\hspace{.5in}}\) .
- \(\underline{\hspace{.5in}}\) of the \(\underline{\hspace{.5in}}\) \(\underline{\hspace{.5in}}\) are \(\underline{\hspace{.5in}}\) . \(\underline{\hspace{.5in}}\)% of the \(\underline{\hspace{.5in}}\) are \(\underline{\hspace{.5in}}\) .
2.3: Favorite Movies and Favorite Classes
For each question:
- Explain to a partner what categories you would use to calculate the percentage.
- Write an expression to use to find the percentage.
- Calculate the percentage to the nearest whole number.
prefer sci-fi movies | prefer drama movies | total | |
---|---|---|---|
prefer science class | |||
prefer English class | |||
total |
- What percentage of the class prefer sci-fi movies?
- What percentage of the class prefer science class?
- What percentage of the class prefer dramas?
- What percentage of the class prefer science class and dramas?
- What percentage of the class prefer English class?
- Of the students who prefer dramas, \(\underline{\hspace{.5in}}\)% prefer English class.
- Of the students who prefer science class, \(\underline{\hspace{.5in}}\)% prefer sci-fi movies.