Question 781023
{{{ 5/5 }}} or {{{ 1 }}} represents all the questions, so
{{{ 5/5 - 2/5 = 3/5 }}} is the fraction of
the questions answered correctly
Multiply top and bottom by {{{ 20 }}}
{{{ ( 20*3 ) / ( 20*5 ) = 60/100 }}}
"per cent" means "per one-hundred", so
60% were answered correctly