Percent of Change- STAAR Review

ANALYZE Information in the Problem

Groups:

(a) What is the problem about?

,

(b) What are we trying to find out?

,

(c) What information do we need?

• The price of a sweater being reduced

• The sweater's price went down to $12

• The sweater cost $20

• What percentage was reduced?

Map your PLAN to a solution:

First I will​ find the amount of change by ​ (a)   ,then I will ​ (b)   , finally I will ​ (c)   to solve the proportion for the reduced percentage.

• subtracting 20 and 12
• set up a proportion, using the changed amount
• cross multiply and divide

SOLVE: What is your final solution after following your plan?

• 8%

• 80%

• 60%

• 40%

ANALYZE Information in the Problem

Groups:

(a) What is the problem about?

,

(b) What are we trying to find out?

,

(c) What information do we need?

• What percentage was reduced?

• The price of a video game being reduced.

• The price of the game was reduced to $45.

• The price of the game was $60.

Map your PLAN to a solution:

First I will find the amount of change by ​ (a)   Then I will ​ (b)   . Finally I will ​ (c)   by ​ (d)   and​ (e)   .

• subtracting $60 and $45
• use the amount of change to set up a proportion
• solve the proportion
• cross multiplying
• dividing

SOLVE: What is your final solution after following your plan?

• 15%

• 25%

• 75%

• 40%

ANALYZE Information in the Problem

Groups:

(a) What is the problem about?

,

(b) What are we trying to find out?

,

(c) What information do we need?

• The price reduced to $200.

• What percentage was the price reduced by?

• The price was $250.

• The price of a television being reduced.

Map your PLAN to a solution:

First I will find the amount of change by ​ (a)   Then I will ​ (b)   . Finally I will ​ (c)   by ​ (d)   and​ (e)   .

• subtracting $250 and $200
• use the amount of change to set up a proportion
• solve the proportion
• cross multiplying
• dividing

SOLVE: What is your final solution after following your plan?

• 20%

• 25%

• 80%

• 50%

ANALYZE Information in the Problem

Groups:

(a) What is the problem about?

,

(b) What are we trying to find out?

,

(c) What information do we need?

• She started eating 48 g of protein.

• What percentage did her protein increase by?

• The amount of protein that Amanda eats being increased.

• She increased her protein to 54 g.