Capital Budgeting-Discounting factor calculation

1) The formula for discounting rate is 1/(1+r/100), where r = rate of interest

2)For Eg : If the discounting rate is 10%, then discounting factor  

for 1st year = 1/(1+10/100) = 0.9091

Simply speaking calculate 1/1.1 = 0.9091 on the calculator, then again press '=' on the calculator then you will get the discounting factor for the 2nd year = 0.8264, then agian press '=' sign and you will get discounting factor for the 3rd year 0.7513 and so on.

Regards,

Devendra