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IM: 7.4.9: More and Less than 1% (Lesson)

By Newsela Staff
Last updated 6 days ago
20 Questions
9.1: Number Talk: What Percentage?
Determine the percentage.

10 is what percentage of 50?

5 is what percentage of 50?

1 is what percentage of 50?

17 is what percentage of 50?

9.2: Waiting Tables

During one waiter’s shift, he delivered appetizers, entrées, and desserts. What percentage of the dishes were desserts? appetizers? entrées? What do your percentages add up to?

Check your answer on the applet.

https://curriculum.illustrativemathematics.org/MS/students/2/4/9/index.html

[Scroll to the tool under "9.2: Waiting Tables"]


9.3: Fractions of a Percent
Find each percentage of 60. What do you notice about your answers?

30% of 60

3% of 60

0.3% of 60

0.03% of 60

What do you notice about your answers?

20% of 5,000 is 1,000 and 21% of 5,000 is 1,050. Find each percentage of 5,000 and be prepared to explain your reasoning. If you get stuck, consider using the double number line diagram.

1% of 5,000

0.1% of 5,000

20.1% of 5,000

20.4% of 5,000

15% of 80 is 12 and 16% of 80 is 12.8. Find each percentage of 80 and be prepared to explain your reasoning.

15.1% of 80

15.7% of 80

To make Sierpinski's triangle,
  • Start with an equilateral triangle. This is step 1.
  • Connect the midpoints of every side, and remove the middle triangle, leaving three smaller triangles. This is step 2.
  • Do the same to each of the remaining triangles. This is step 3.
  • Keep repeating this process.

What percentage of the area of the original triangle is left after step 2? Step 3? Step 10?

At which step does the percentage first fall below 1%?

9.4: Population Growth

The population of City A was approximately 243,000 people, and it increased by 8% in one year. What was the new population?

The population of city B was approximately 7,150,000, and it increased by 0.8% in one year. What was the new population?