Adding a percent sign to a number reduces it by 9.9%, which turns out to be ()

Adding a percent sign to a number reduces it by 9.9%, which turns out to be ()


9.9%÷(100-1)=0.1%
0.1%x100=0.1
If you add a percentage sign to a number, it will be reduced by 9.9%, which was (0.1)



Add a percentage sign to a number, and the number will be reduced by 7.92. What is the original number? The process must be complete


This number is x, X% = x-7.92, x = 8



1.2.3.4. How many non repeating four digit numbers can four numbers constitute


Full Permutation
4*3*2*1=24