Question 1061953
Rate for buying bananas:
{{{ 5/4 }}} RS/bananas 
{{{ 80*(5/4) = 100 }}} RS spent for 80 bananas
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Selling rate:
{{{ 5/8 }}} RS/bananas
25% were spoiled, so only 
{{{ .75*80 = 60 }}} could be sold
{{{ 60*(5/8) = 37.5 }}} RS collected
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{{{ 37.5 - 100 = -62.5 }}} RS is the loss
The % loss is:
{{{ 100*( 62.5/100 ) = 62.5 }}}
62.5% loss
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check my math, too