Respuesta :

tramserran

 [tex]\frac{new - original}{original}[/tex]

= [tex]\frac{30 - 40}{40}[/tex]

= [tex]\frac{- 10}{40}[/tex]

= [tex]\frac{-1}{4}[/tex]

= - 0.25

= 25% decrease      (negative sign = decrease, positive sign = increase)

Answer: 25%


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