How to define yearly WDV method for depreciation

Hi All,

My client is using yearly WDV method for depreciation which you can understand by below example -

Suppose we purchase a machinery of Rs. 10,00,000 and on which Depreciation rate is 12% p.a.

My client calculate the depreciation on the machinery for a year by simple method which is  = 10,00,000*12% = 1,20,000 Rs. yearly depreciation cumulative amount.

Now to calculate the depreciation monthly client simply devide the depreciation rate by 12 i.e. = 12/12 = 1% p.m. depreciation rate.

Thus for month depreciation is = 10,00,000*1% = 10,000 Rs.

They calculate like this for 12 months after 12 months they reduce the cumulative depreciation amount from Book value i.e 10,00,000 - 1,20,000 = 8,80,000Rs.