Question 1128560
{{{ 45 - 20.25 = 24.75 }}} was the amount taken 
off the original price
{{{ 24.75/45 = .55 }}}
The discount rate was 55%
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check:
{{{ 45 - .55*45 = 45 - 24.75 }}}
{{{ 45 - .55*45 = 20.25 }}}