Question 832204
It sounds like they started out with a
price {{{ p }}}, then they took 10% off it,
so it cost {{{ p - .1p  = .9p }}}, then they
decided to take 15% off of that, so it
cost {{{ .9p - .15*.9p = .9p*( 1 - .15 ) }}}
{{{ .9p*( 1 - .15 ) = .85*.9p }}}
{{{ .85*.9p = .765p }}}
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That's what you ended up paying, so
{{{ .765p = 306 }}}
{{{ p = 306/.765 }}}
{{{ p = 400 }}}
The original price was $400
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check:
{{{ .9*400 = 360 }}}
{{{ .85*360 = 306 }}}
OK