8 4 Percent Of Change
Transcript of 8 4 Percent Of Change
8-4 Percent of Change
Find the percent of increase or decrease
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%
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.
What is percent of Change?
T-table
Percent of Increase Percent of Decrease
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
Word problems worksheet
• Do not write on the handout
# sort
• Sort problems into percent of increase or decrease.
• You do not have to solve them.
Homework
• P 352: 1-3, 12-22 even, 25-27, 29, 32, 33, 35 (16 problems)
• QUIZ 8.2-8.4 tomorrow