// students score, total possible score
// 15/20 -> You got a C (75%)!
// A 90-100, B 80-89, C 70-79, D 60-69, F 0-59



let scoreCalc = function(studentScore, totalScore) {
    return studentScore / totalScore
    }

    let gradePercent = scoreCalc(17, 20)

    let gradeCalc = function(gradePercent) {
    let gradeLetter
    if (gradePercent >= 90) {
    gradeLetter = 'A'
    } else if (gradePercent <= 89 && gradePercent > 80) {
    gradeLetter = 'B'
    } else if (gradePercent <= 79 && gradePercent > 70) {
    gradeLetter = 'C'
    } else if (gradePercent <= 69 && gradePercent > 60) {
    gradeLetter = 'D'
    } else if (gradePercent <= 59) {
    gradeLetter = 'F'
    }
    return gradeLetter
    }

    let gradeLetter = gradeCalc(gradePercent * 100)

    console.log(`You got a ${gradeLetter} (${gradePercent * 100}%)!`)