using System;

​

class Program {

    static void Main(string[] args) {

        Console.Write("Enter grade in percentile form: ");

        double percentileGrade = double.Parse(Console.ReadLine());

​

        string gradeEquivalent = "";

​

        if (percentileGrade >= 98 && percentileGrade <= 100) {

            gradeEquivalent = "1.00";

        } else if (percentileGrade >= 95 && percentileGrade <= 97) {

            gradeEquivalent = "1.25";

        } else if (percentileGrade >= 92 && percentileGrade <= 94) {

            gradeEquivalent = "1.50";

        } else if (percentileGrade >= 89 && percentileGrade <= 91 || percentileGrade == 87.5) {

            gradeEquivalent = "1.75";

        } else if (percentileGrade >= 85 && percentileGrade <= 88) {

            gradeEquivalent = "2.00";

        } else if (percentileGrade >= 82 && percentileGrade <= 84) {

            gradeEquivalent = "2.25";

        } else if (percentileGrade >= 80 && percentileGrade <= 81) {

            gradeEquivalent = "2.50";

        } else if (percentileGrade >= 77 && percentileGrade <= 79) {

            gradeEquivalent = "2.75";

        } else if (percentileGrade >= 75 && percentileGrade <= 76 || percentileGrade == 73.5) {

            gradeEquivalent = "3.00";

        } else {

            gradeEquivalent = "Incomplete";

        }

​

        Console.WriteLine("Grade equivalent: {0}", gradeEquivalent);

    }

}

​