Respuesta :

 since the original price was ninety we have to multiply 5/6 by 90
90/1(5/6)
=450/6
=75
Couldn't you go 1/6 x $90. 1/6 being the sale price because 5/6 + 1/6 = 6/6 which is the whole price. 1/6 = 0.166 as a decimal so you would multiply 90 x .16 = 14.40. then $90.00 - 14.40 = 75.60 for the sale price.