Question 992149

 the original price {{{p}}} of a pair of shoes if the sale price is ${{{13}}} after a {{{75}}}% discount:

{{{p-(75/100)p=13}}}

{{{p-75p/100=13}}}

{{{(100p-75p)/100=13}}}

{{{25p=13*100}}}

{{{p=(13*cross(100)4)/cross(25)1}}}

{{{p=13*4}}}

{{{p=52}}}

so, the original price of a pair of shoes is ${{{52}}} 


check:

the original price: ${{{52}}} 
discount:${{{(75/100)52=0.75*52=39}}} 
sale price: ${{{52-39=13}}}