SOLUTION: ________decrease by 70% is 4.35. What formula is used to solve this?

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Question 102283: ________decrease by 70% is 4.35. What formula is used to solve this?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
________decrease by 70% is 4.35.
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It probably means x-0.70x = 4.35
0.3x = 4.35
x = 14.5
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Cheers,
Stan H.