If the rate of depreciation is the same then the amount of depreciation under written down value method will be:
Fixed Installment Method or Equal Installment Method or Straight Line Method or Fixed Percentage on Original Cost Method: In this method a fixed or equal amount of depreciation written off as depreciation at the end of each year, during the life time of the asset.
Written-down value can be calculated by a method of
depreciation that is sometimes called the diminishing balance method. This
accounting technique reduces the value of an asset by a set percentage each
year. When selling the asset, the book value is used to help determine the
minimum value for which it will be sold.