8 4 Percent Of Change

9
8-4 Percent of Change Find the percent of increase or decrease

Transcript of 8 4 Percent Of Change

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8-4 Percent of Change

Find the percent of increase or decrease

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Work with a partner• Begin with 2 paper strips. On each strip, label

0% on the left side and 100% on the right side.

• Fold one of the paper strips in half. Mark 50% in the center.

• Cut this strip at the 50% mark and place it beside the end of the purple strip. The new longer strip represents a 50% increase or 105%

0% 100%0% 100%

0% 50% 100%

0% 100% 0% 50%

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Model each percent of change• 25% increase

• 75% increase

• 30% increase

• Describe a model that represents a 100% increase, a 200% increase, and a 300% increase.

• Describe how this process would change to show percent of decrease.

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What is percent of Change?

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T-table

Percent of Increase Percent of Decrease

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Find each percent of change. Round to the nearest whole percent if necessary. Put it

under the correct side of the t-table.

a. original: 10 new : 13

b. original: 20 new: 15

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Word problems worksheet

• Do not write on the handout

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# sort

• Sort problems into percent of increase or decrease.

• You do not have to solve them.

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Homework

• P 352: 1-3, 12-22 even, 25-27, 29, 32, 33, 35 (16 problems)

• QUIZ 8.2-8.4 tomorrow