SOLUTION: Each of two inventions saves 40% on fuel. If you use both inventions, what percent of fuel is saved?

Question 161555: Each of two inventions saves 40% on fuel. If you use both inventions, what percent of fuel is saved?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Each of two inventions saves 40% on fuel. If you use both inventions, what percent of fuel is saved?
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64%
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Calculate how much fuel is used with each device. With one, it's 60% used, or 0.6 as much.
The 2nd device saves 40% of that, or the consumption drops to 0.6 of what it is with only 1 device used. So, it's 0.6 x 0.6 used, or 0.36 of the original. That's 36%, so 64% is saved.
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PS Don't send any money for things like this. They're scams.
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