Question 1208794
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Let x be the desired percent in decimal form.


Then your equation is

    (1-0.15)*(1-0.1)*(1+x) = 1.


It is quite obvious, WHY this equation should be in this form,
so I will not explain it to you for not to be boring :)


Simplify this equation and find x


    0.85*0.9*(1+x) = 1,

    1 + x = {{{1/(0.85*0.9)}}} = 1.30719  (rounded).


So, the <U>ANSWER</U>  is  x = 1.30719 - 1 = 0.30719,  or  30.719%.
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Solved.