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Percent change and taxes

Percent change and taxes. Chapter 9 sec 1. Percent. Def. Derived from the latin “per centum”. Which means “per hundred”. Example 17% = .017 = . Problems . 36.74% = .3674 = Viewing the decimal, .3 is the hundredth place, the .36, the number 6 is the thousandth place.

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Percent change and taxes

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  1. Percent change and taxes Chapter 9 sec 1

  2. Percent • Def. • Derived from the latin “per centum”. Which means “per hundred”. • Example • 17% = .017 =

  3. Problems • 36.74% = .3674 = • Viewing the decimal, .3 is the hundredth place, the .36, the number 6 is the thousandth place.

  4. Key words to help you • The word “of” in mathematics means multiplication. • The word “is” is used as equal to.

  5. Percent Equation • Here is the equation that you will need to solve. • Percent * base = amount

  6. Problems • A) Write as a decimal and as a %. • B) What is 47% of 80? • C) 74 is 45% of what number? • D) 234 is what percent of 745?

  7. Solution • A) = .4286 = 42.86% • B) First change the % to a decimal or fraction. • .47*80 = 37.6

  8. C) 74 = .45 * x, where x is some number. X = 164.44 • D) 234 = x * 745 = .314 = 31.4%

  9. Percent change • Percent change =

  10. Daishu’s Electronics is having an quarter of year clearance in which the TV and radio ads proclaim that all electronics are sold at 5% markup over the dealer’s cost. Daishu has a 57’’ Flatscreen TV for sale for $2,889. On the internet, you find out that this particular model has a dealer cost of 2,700. Is Daishu being honest in his advertising?

  11. To determine if Daishu is honest or not, you would use the percent change equation.

  12. Solution • % change = = = 0.07 = 7%

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