An appliance is on sale at 30% discount. If the sale price is $42.00, what was the original price of the appliance?
3 answers
Do 42 times .30 and whatever number you get, add onto 42 and that's the original price.
That is not correct
the 42.00 represents .7 of the original price
so .7x = 42
x = 42/.7 = $60
The original price was $60
check:
30% discount of $60 = .3(60) = 18
sale price = 60 - 18 = 42
your way:
.3(42) = 12.60
your price = 42+12.60 = 54.6
now .3(54.6) = 16.38
your sale price = 54.60 - 16.38 = $38 ≠ $42
the 42.00 represents .7 of the original price
so .7x = 42
x = 42/.7 = $60
The original price was $60
check:
30% discount of $60 = .3(60) = 18
sale price = 60 - 18 = 42
your way:
.3(42) = 12.60
your price = 42+12.60 = 54.6
now .3(54.6) = 16.38
your sale price = 54.60 - 16.38 = $38 ≠ $42
Thank you so much, this really helped me. I didn't understand how you got .7 at first but now that you sort of explained it I get it now!