Percent Change (NEW value)

Presentation

•

Mathematics

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7th Grade

•

Easy

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CCSS

6.RP.A.3C, 8.EE.A.4

Standards-aligned

Katrina Klinke

Used 9+ times

FREE Resource

10 Slides • 6 Questions

Percent Change (NEW value)

Aim: How do we determine the new value in a percent change problem?

Make sure to have a notebook in front of you to take notes to upload as your exit ticket for the day!

Percent Change

$\frac{quantity\ of\ change}{original}=\frac{new-original}{original}$

Open Ended

Do Now:

1. In the Bronx, the average low temperature for January was 28 °F. The average low in February was 36 °F. What was the percent of increase in the Bronx's average low temperature?

2. What is the percent change from 36°F to 28°F?

3. Is the percent change the same for question 1 and 2? Why or why not?

Type response here

Multiple Choice

What is the percent of change? 18.7 kg to 4.5 kg

76% increase

3% increase

76% decrease

3% decrease

Finding the New Value in a Percent Change Problem

Step 1: Determine whether the change is an increase (+) or decrease (-)
Determine the Original Amount and the New Amount
Solve for the unknown by substituting in values into the equation and isolating the variable
$decimal=\frac{new-original}{original}$

Matthew is trying to drink more water, so he has been keeping a log of how much water he drinks. Matthew drank 46 ounces of water two days ago. Yesterday, he drank 50% less. How much water did he drink yesterday?

Multiple Choice

A gardening store ordered 5,710 potted plants last year. This year, the store ordered 20% fewer potted plants. How many potted plants were ordered this year?

4568 potted plants

6852 potted plants

Open Ended

Why does 6852 potted plants not make sense as an answer to the last question?

Type response here

Multiple Choice

A generation ago, the graduating class at Fairfax High School was 150 students. This year, it is 54% larger. What is the current size of the graduating class?

69 students

231 students

Open Ended

Why does 69 students not make sense as an answer to the last question?

Type response here

Percent Change (NEW value)

Aim: How do we determine the new value in a percent change problem?

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