Answer :

new amount - original amount = amount of change
then [tex] \frac{amount~of~change}{original~amount} [/tex] × [tex]100[/tex]

So,
[tex]25-40=-15[/tex]

Then,
|[tex] \frac{-15}{40} [/tex] × 100 = 37.5%|

Your answer is C. 37.5%

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