SOLUTION: Why is $10 to $20 a 100% increase, while $20 to $10 is a 50% decrease. Explain your answer.

Question 292269: Why is $10 to $20 a 100% increase, while $20 to $10 is a 50% decrease. Explain your answer.
Found 2 solutions by Alan3354, richwmiller:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Why is $10 to $20 a 100% increase, while $20 to $10 is a 50% decrease. Explain your answer.
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It's based on what the change is from.
From 10 to 20 starts with 10. 10/10 is 100%
From 20 to 10 starts with 20. 10/20 is 50%
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What you start with is the base.
If you try to do it any other way, it's a lot less meaningful.

Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
The increase from 10 to 20 is 10
10/10=1 = 100%
but decrease from 20 to 10 is 20-10=10
10/20=.5=50%

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