There is a math error in the code and i cant find it! must be in c#

Lab3A_test1 - 0 points Expected Amount owed: SAPR: Monthly percentage rate: 1.385833 Minimum payment: $52.23333 Your Output: Amount owed: SAPR: Monthly percentage rate: 1.30583333333333 Minimum payment: $52.2333333333333 Lab3A_test2 0 points Expected Amount od: SAPR Monthly percentage rate 0.8216667 Minimum payment: $20.54167 Your Output: Amount owed: SAPR Monthly percentage rate: 0.821666666666667 Minimun payment: $20.5416666666667 Lab3A_test3 - 0 points Expected Amount owed: SAPR: Monthly percentage rate: 1.415833 Minimur payment: $28.31667 Your Output Amount owed: SAPRI Monthly percentage rate: 1.41583333333333 Minimun payment: $28.3166666666667 Lab3A.CS 1 Nm using System; class Creditcards { CSE 1321L 9 10 11 12 13 ASUUSA static void Main() { double am, apr; Console.Write("Amount owed: $"); am = Convert.ToDouble(Console.ReadLine()); Console.Write("APR: "); apr = Convert.ToDouble(Console.ReadLine()); Console.WriteLine("Monthly percentage rate: + (apr / 12)); Console.WriteLine("Minimum payment: $" + (am* (apr / 1200))); 14 15 16 17 18 19 20 ) 21