C# 28.2 Getting a Raise (what am I missing here??)

Question

This code clears 4 of the 5 test cases; the one it doesn't clear is a "hidden" one. I'm not sure what I'm doing wrong. Anyone have any ideas?

-----------------

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SoloLearn
{
class Program
{
static void Main(string[] args)
{
int salaryBudget = Convert.ToInt32(Console.ReadLine());
int percent = Convert.ToInt32(Console.ReadLine());

Console.WriteLine("Before the increase: " + salaryBudget);

//complete the method call
//**** This is part of the exercise ****
Increase(ref salaryBudget, ref percent);

Console.WriteLine("After the increase: " + salaryBudget);
}
//complete the method
//**** This is part of the exercise ****
static void Increase(ref int a, ref int b)
{
double bTemp = Convert.ToDouble("1." + (Convert.ToString(b)));
a = Convert.ToInt32(Convert.ToDouble(a) * bTemp);
}
}
}

Answer 1

Much too complicated. Where the actual inaccuracy appears, I don't know. But :

* it suffices to pass salaryBudget only as ref since percent does not change

* using 1.15 as double is bound to introduce rounding errors too early on. I opted to use int only:

//complete the method
static void Increase(ref int salaryBudget, int percent)
{
salaryBudget = (salaryBudget * (100 + percent )) / 100;
}

Answer 2

static void Main(string[] args)
{
double salaryBudget = Convert.ToDouble(Console.ReadLine());
double percent = Convert.ToDouble (Console.ReadLine());

Console.WriteLine("Before the increase: " + salaryBudget);

//complete the method call
Increase(ref salaryBudget,percent);

Console.WriteLine("After the increase: " + salaryBudget);
}
//complete the method
static void Increase(ref double sB,double p)
{
sB=sB+(sB*p/100);

}
}

Answer 3

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SoloLearn
{
class Program
{
static void Main(string[] args)
{
int salaryBudget = Convert.ToInt32(Console.ReadLine());
int percent = Convert.ToInt32(Console.ReadLine());

Console.WriteLine("Before the increase: " + salaryBudget);

//complete the method call
Increase(ref salaryBudget, percent);

Console.WriteLine("After the increase: " + salaryBudget);
}
//complete the method
static void Increase(ref int x, int y)
{
x = (x * (100 + y )) / 100;
}
}
}

This Code is working 100% percentage without error in Sololearn compiler.

Answer 4

static void Main(string[] args)
{
int salaryBudget = Convert.ToInt32(Console.ReadLine());
int percent = Convert.ToInt32(Console.ReadLine());

Console.WriteLine("Before the increase: " + salaryBudget);

//complete the method call
double result = Increase(salaryBudget, percent);

Console.WriteLine("After the increase: " + result);
}
//complete the method
static double Increase(double b, double p)
{
double result = Convert.ToDouble(b + (b * p / 100));
return result;
}