6th grade math
posted by abbie .
if a shirt is 45 % off and the sale price is 114.95what is the original cost?
please help me with this formula

100%  45% = 55% = 0.55
Let x = original cost.
0.55x = 114.95
x = ? 
thank you ms. suei am the mom and could not figure the formula out!

You're welcome, Abbie :)
Another way to do approach this problem is to divide 114.95 by 0.55 (which is what the equation does). 
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