Comparing Quantities Class 8 Notes Maths | StudyTution

  • Discount is a reduction given on marked price.
  • Discount = Marked Price – Sale Price (S.P.)
  • Discount can be calculated when discount percentage is given.
  • Discount = Discount % of Marked Price
  • Additional expenses made after buying an article are included in the cost price and are known as overhead expenses.
  • cost price = buying price + overhead expenses
  •  Sales Tax is charged on the sale of an item by the government and is added to the Bill Amount.
  • Sales tax = Tax% of sale amount
  • These days, however, the selling prices (known as MRP) include the tax known as VAT (Value Added Tax).
  • The interest compounded annually is the interest calculated on the previous year’s amount A, (A = P + I).
  •  The time period after which the interest is added each time to form a new principal is called the conversion period.
  •  When the interest is compounded half yearly, there are two conversion periods in a year of duration 6 months each.
  • Amount when interest is compounded annually is n R A P1 100  where P is Principal R is Rate of interest
    n is Time Period
  •  Amount when interest is compounded half yearly is 2 R A P1 200 n  where R 200 is half yearly rate and 2n is number of half years.
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