percentage

• Percentage


  Out of 100, divide by 100
• Changing a fraction to a percentage

  1. Divide the numerator by the denominator

  2. Multiply by 100%
• Finding percentage amounts


  Calculate a percentage of a given quantity

  Increase or decrease a quantity by a given percentage

  Find the original value of a quantity when it has been increased or decreased by a given percentage

  Express one quantity as a percentage of another
• Finding the original amount before a percentage change

  Write the final amount as 100% plus/minus the percentage change, multiplied by the original amount
• Expressing a change as a percentage

  Actual increase or decrease / Original cost x 100%
• Percentage button on calculator

  The result depends on when you press the % button. It can multiply, divide or have no effect.