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Percent of Change

Percent of Change. By Samuel Chukwuemeka ( Samdom For Peace). Objectives. At the end of this chapter, students will: To find percent of increase To find percent of decrease. Vocabulary Words. Percent Change Increase Decrease Percent of change Percent of increase

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Percent of Change

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  1. Percent of Change By Samuel Chukwuemeka (Samdom For Peace)

  2. Objectives At the end of this chapter, students will: • To find percent of increase • To find percent of decrease

  3. Vocabulary Words • Percent • Change • Increase • Decrease • Percent of change • Percent of increase • Percent of decrease

  4. Definitions • Percent is defined as a part (or one part) in a hundred • Change is causing something to be different. As regards this topic, it is seen as an increase or decrease in the value of a variable or constant. For example, If I have $1 today and $2 tomorrow, • Is there a change? • Yes • What kind of change? • An increase

  5. If I have $2 today and a $1 tomorrow, Is there a change? Yes What kind of change? A decrease If I have $1 today and $1 tomorrow, Is there a change? No An increase will occur when the new value is greater than the original value. Likewise, a decrease will occur when the new value is less than the original value.

  6. Amount of increase = new value-old value • Amount of decrease = old value – new value For example, Find the amount of increase from 5 to 8 old value = 5, new value = 8 Amt. of increase = 8 – 5= 3 Find the amount of decease from 8 to 5 old value = 8, new value = 5 Amt. of decrease = 8 – 5 = 3

  7. Note this! • There could be an increase or decrease but the value of that change (increase or decrease) is NOT negative • % increase = amount of increase * 100 original amount • % decrease = amount of decrease * 100 original amount • % increase or decrease is NOT negative • Ask your questions

  8. Can we solve some Math? • Tosky went to gamble with $75 and came back with $45. • Was there a change? • What type of change? • Find the % of change • Original amount = $75 ; new amount = $45 • Change = $75 - $45= $30 (Remember change can either be an increase or decrease but cannot be negative) • In this case, the change is a/an • Decrease. Good. Can you tell me why? • % decrease = 30 * 100 = 40% 75

  9. Tosky went to gamble with $45 and came back with $75. • Was there a change? • What type of change? • Find the % of change • Original amount = $45 ; new amount = $75 • Change = $75 - $45= $30 (Remember change can either be an increase or decrease but cannot be negative) • In this case, the change is a/an • Increase. Good. Can you tell me why? • % increase = 30 * 100 = 66.7% 45

  10. Alright Sweethearts and young gentlemen, ask Samdom your questions? • Do not be shy • Remember to write your notes • Do your homework • Solve more math • Be good

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