Pre-Algebra

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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 -

    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 -

    Well, sorry -.-

    Thanks for the answer, lol.

    I thought it would be 28.

  • Pre-Algebra -

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

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