Homework Help Forum: Pre-Algebra

Posted by Dean on Tuesday, October 27, 2009 at 11:30pm.

Can I have someone check this please? I wouldn't want to do the whole page, then find out I had done them all wrong. :( [Percents of Change] A $100 digital watch is now $72 Decrease, 72/100 = negative percent. 100/72.00 = .72 .72 - 1 = 30%? Thanks. 30% is my final answer, correct?

• Pre-Algebra - Reiny, Tuesday, October 27, 2009 at 11:50pm

  so, isn't the change in the price $28 ? so percent of change is 28/100 = 28% Your last two lines make no sense. 100/72.00 = .72 ?? 100/72 = 1.388889 not .72 (why are you dividing 100 by 72 in the first place?) .72 - 1 = 30%? ????? How can that be 30% ? .72 - 1 = -.28

  
  

• Pre-Algebra - Dean, Tuesday, October 27, 2009 at 11:57pm

  Well, sorry -.- Thanks for the answer, lol. I thought it would be 28.

  
  

• Pre-Algebra - Seth, Wednesday, October 28, 2009 at 12:34am

  Can you type the full question to give us the depreciation rate???

  
  

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