A store is selling a pair of jeans for $60.00. If they did a mark up on jeans at 25%, what was the store's cost for the pair of jeans.

x

=                                   an example

$

30

Explanation:

Remember that if there is a 25% discount, then the amount you are paying represents 75%. We know the original price (ie 100%)

There are several methods.

Simplest: Find 25% of the$40 and subtract to find the price to be paid.

25

%

o

f

40

=

25

100

×

40

=

10

discount

price =  

40

−

10

=

$

30

Second method. Find 75% immediately

75

%

o

f

40

=

75

100

×

40

=

$

30

You can do any percentage question using the concept of direct proportion.

40

100

=

x

75

                     if $40 is 100%, how much is 75%?

100

x

=

75

×

40

                           cross-multiply

x

=

75

×

40

100

 this a possible expression for the sale price

x

=

$

30

Step-by-step explanation: