4326 = p + ptr/100 where p is original investment, t is time (1) and r is rate per cent (5)
4326 = p + 5p/100
432600 = 105p
p = 432600/105 = 4120
is that divided by 100, shouldn't you add a 12 there for the amount of months he invested
2,400
215
$2275.28
$1326.91
$810
2,400
775
696,00
$775
215
$810
$43.20 more
$2400
Account B
$2275.28
$1326.91
I have found to get more than 1.5 % return on savings, you need a minimum of $10,000 to be invested.