Really driving me mad now. I need to use multiple percentages please help

I need to find the way to do a percentage - a percentage - a percentage
my example is 100 - 40% - 10 % - 10 %
So the answers I am looking for are
100 - 40 % = 60 then minus 10% which would equal 54 then minus another 10% that would get final total to 48.6
so 100 - 40% = 60 then
60 minus 10% = 6 but then thats taken away from 60 to make 54
then finally 54 - 10% = 5.4 which then taken away from 54 equals 48.6
Please help

thanks

Hi

Try =((100-(100*0.4))*0.9)*0.9

or if you have 100 in cell A1, try entering =((A1-(A1*0.4))*0.9)*0.9 in cell B1

Regards
Alan