Step-by-Step Solution

  1. Divide numerator by denominator: 18 ÷ 28 = 0.642857…
  2. Multiply by 100: 0.642857 × 100 = 64.2857%
  3. Rounded to 2 decimal places: 64.29%

Formula

(Part ÷ Whole) × 100 = Percentage
(18 ÷ 28) × 100 = 64.29%

Grade Scale Reference

PercentageLetter Grade
90–100%A
80–89%B
70–79%C
64.29% (18/28)D
Below 60%F

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