PreAlgebra
posted by Dean on .
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?

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 
Well, sorry .
Thanks for the answer, lol.
I thought it would be 28. 
Can you type the full question to give us the depreciation rate???