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A prolonged heat spell in the town of Blacksburg causes an increase in the use of air conditioners during the summer months. The average consumption of electricity rises to 980 kWh per month.

Calculate the percent change in electricity use.

Respuesta :

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Percentage change refers to the difference in values of a measured quantity expressed as a percentage.

  • Final consumption average due to heat = 980 kWh

  • To obtain the percentage change, the initial value for the amount of heat consumed is required.

  • Let's take the initial consumption as 680kWh

  • [tex] \frac{change \: in \: consumption}{initial \: consumption} \times 100\%[/tex]

  • Change in consumption = (Final - Initial)

  • [tex] \frac{980 - 680}{680} \times 100\% = ( \frac{300}{680}) \times 100\% = 0.441 \times 100\% = 44.1\%[/tex]

Hence, the percentage change in electricity use from 680kWh to 980kWh is 44.1%

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