Two fifths of $500 is (2/5)*$500 = $<<(2/5)*500=200>>200
She needed $200 more than $500 which is $200+ $500 = $<<200+500=700>>700
15% of $700 is (15/100)*$700 = $<<(15/100)*700=105>>105
She was given a $105 discount so she has to pay $700-$105 = $595
She would still need $595-$500= $<<595-500=95>>95
#### 95