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$500.

If you increase something by 400% then you are making it 5 times larger.

So if $100 is increased by 400% this equals $100 times 5 = $500.

In terms of the easiest steps possible to understand the principle here, you could also work this out by:

*finding out what 100% of the value is.

*multiplying this by 4 (as we have 400%)

*adding this to the original amount (as we are increasing by 400%)

100% of $100 = $100

$100 * 4 = $400

$400 + $100 = $500

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Wiki User

13y ago

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