Question

Rooney decides to pay $200 in 3 payments. the first payment is 10 percent of the original fee. the second payment is 25 percent of the original fee how much will he pay when he makes the third and final payment

Answer 1

I think it is 66 because it’s lit

Answer 2

$200 represents the original fee.  Then:
 
$200 = .10($200) + .25($200) + final payment

$200 = 0.30($200) + final payment

$200 - $60 = final payment

final payment is $140.