Answer: $20.84
Step-by-step explanation: In order to calculate Tony’s minimum payment you need to calculate how much 15% is of his balance.
138.90 x .15 = $20.84, which is 15% of his balance.
The minimum payment is the greater of 15% or $20, so his minimum payment will be $20.84.
The answer is $188.90. If I am wrong, please correct me.