Question 1196530
let the last price be {{{x}}}

if he bought a toaster oven for ${{{75}}} and this price was {{{1/4}}} off the last price, we have

{{{75=(1/4)x}}}

{{{75*4=x}}}

{{{x=300}}}

the last price was ${{{300}}}


but if this price was {{{1/4}}} off the last price could mean that original price was marked off {{{75}}}% or {{{0.75}}}, we have


{{{75=0.75x}}}

{{{x=75/0.75}}}

{{{x=100}}}