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Bell Work

Bell Work. After an increase in his weekly wage of 20% Joe has $ 450.What was his wage before the increase?. $450 is 120% of . $375. Complete a number line with this information. . $ 450. 0%. 100%. 120%. Percent of Increase and decrease.

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Bell Work

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  1. Bell Work After an increase in his weekly wage of 20% Joe has $450.What was his wage before the increase? $450 is 120% of  $375 Complete a number line with this information  $450 0% 100% 120%

  2. Percent of Increase and decrease

  3. A percent change is an increase or decrease given as a percent of the original amount. Percent increase describes an amount that has grown and percent decrease describes an amount that has be reduced.

  4. Finding Percent Increase and Decrease Find each percent change. Tell whether it is a percent increase or decrease. Movie tickets went from $8 to $10 Simplify the numerator. Simplify the fraction. = 0.25 = 25% Write the answer as a percent. $8 to $10 is an increase, so a change from 8 to 10 is a 25% increase.

  5. Finding Percent Increase and Decrease Find the percent change. Tell whether it is a percent increase or decrease. Shoes went from $75 to $30 Simplify the fraction. Simplify the numerator. = 0.6 Write the answer as a percent. = 60% 75 to 30 is a decrease, so a change from 75 to 30 is a 60% decrease.

  6. You try Find each percent change. Tell whether it is a percent increase or decrease. From 200 to 110 Simplify the numerator. Simplify the fraction. = 0.6 Write the answer as a percent. = 60% 200 to 110 is an decrease, so a change from 200 to 110 is a 60% decrease.

  7. You try: Find each percent change. Tell whether it is a percent increase or decrease. From 25 to 30 Simplify the fraction. Simplify the numerator. = 0.20 Write the answer as a percent. = 20% 25 to 30 is an increase, so a change from 25 to 30 is a 20% increase.

  8. Finding Percent Increase and Decrease A. Find the result when 12 is increased by 50%. Find 50% of 12. This is the amount of increase. 0.50(12) = 6 It is a percent increase, so add 6 to the original amount. 12 + 6 =18 12 increased by 50% is 18. B. Find the result when 55 is decreased by 60%. Find 60% of 55. This is the amount of decrease. 0.60(55) = 33 It is a percent decrease so subtract 33 from the the original amount. 55 – 33 = 22 55 decreased by 60% is 22.

  9. You try: A. Find the result when 72 is increased by 25%. 0.25(72) = 18 Find 25% of 72. This is the amount of increase. 72 + 18 =90 It is a percent increase, so add 18 to the original amount. 72 increased by 25% is 90. B. Find the result when 10 is decreased by 40%. Find 40% of 10. This is the amount of decrease. 0.40(10) = 4 It is a percent decrease so subtract 4 from the the original amount. 10 – 4 = 6 10 decreased by 40% is 6.

  10. Practice:

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