i need the solution to that problem ASAP plz
10% more than 10% less than x is what percent of 10 x?
any ideas !
10x(1-0.1) = 9x
We then put 10% back on, but now it will be 10% of the 9x so we won't get 10x but rather:
9x(1+0.1) = 9.9x.
In one step it would be
10x(1-0.1)(1+0.1) which is the difference of two squares and simplifies to 10(1-0.01) = 9.9