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
![24 shapes with different fills.](https://cms-im.s3.amazonaws.com/wgdyg90sclxki2urnyvnjpbede7r?response-content-disposition=inline%3B%20filename%3D%22ExS%20Shapes%20Galore.png%22%3B%20filename%2A%3DUTF-8%27%27ExS%2520Shapes%2520Galore.png&response-content-type=image%2Fpng&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAXQCCIHWF3XOEFOW4%2F20240630%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20240630T162100Z&X-Amz-Expires=604800&X-Amz-SignedHeaders=host&X-Amz-Signature=583b3443462ebbf5d6dc73ad072958e74dad4ab4aed88be7d0026a9e76e1fd86)
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.