Question 741159
{{{ (3/8)*64 }}} people leave in the 1st half hour
{{{ (5/8)*64 = 40 }}} people are remaining
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{{{ (1/5)*40 }}} leave in the next half hour
{{{ (4/5)*40 = 32 }}} people are remaining
{{{ ( 32/64 )*100 = 50 }}}
50% of those who began see the entire movie