Percentage = (Part ÷ Whole) × 100
Convert the result to a percent by adding the % sign
If you need to find a part from a percentage: Part = (Percentage ÷ 100) × Whole
If you need to find the whole from a part and percentage: Whole = Part ÷ (Percentage ÷ 100)
If you need to find what percent one number is of another: (Number ÷ Total) × 100
If you need to find percentage increase: ((New − Old) ÷ Old) × 100
If you need to find percentage decrease: ((Old − New) ÷ Old) × 100