# Pre-Algebra

posted by .

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 -.-

I thought it would be 28.

• Pre-Algebra -

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

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