Just be happy for our phone someone who have redmi 2 or mi 3 can complain about not getting your phone.you've got fingerprint and 3gb ram lot of storage too don't expect too much for the price.
3000-(3000×5/100)=3000-150=2850
Yes it is that but i think the calculator don't understand so it is considered as 5/100 or 0,05.
5/100 of 3000 because we need to remove from 3000 ,which 3000 is considered as 100%.
Space is like having two devices
Per exemple you have your own space, the other one you want to create don't have the apps you got in the first place except system apps installed,the chinese app named assistant it is like Siri or Google now.