Question

Why is $20 to $10 a 50% decrease, but $10 to $20 is a 100% increase?

Answer 1

Let me help you!

Explanation:

Think of the percentages as a fraction out of 100

$20 starts out as 100/100

$10 is exactly half of $20, so it's represented by 50/100

if you subtract 50 from 100, you get 50/100.

you're left with 50% of your original number, which means you just has a fifty percent decrease of the original.

Now, the reverse scenario...

$10 starts out as 100/100

$20 is exactly double that of $10, so it is represented by 200/100

If you subtract 100 from 200, you're left with 100.

This means that you've doubled your money, or added the original amount of money onto itself. it can be represented by 1 + 1 as well.

Answer 2

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%

Explanation:

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