Question

Your gas bill went up from $125 $ 125 per month to $150 $ 150 per month. What is the percent increase of your gas bill?

Answer 1

from 125 to 150 is just 25 units.

now if we take 125 to be the 100%, what is 25 off of it in percentage?

`\bf \begin{array}{ccll} amount&\%\\ \cline{1-2} 125&100\\ 25&x \end{array}\implies \cfrac{125}{25}=\cfrac{100}{x}\implies 5=\cfrac{100}{x} \\\\\\ x=\cfrac{100}{5}\implies x=20`

Answer 2

Answer: 20%

Explanation:

Given : Previous price of gas per month= $125

New price of gas per month= $ 150

Then,

Increase in price of gas = Previous price - New price

= $ 150 - $125 = $25

Now , the percent increase of your gas bill will be :_

`\frac{\text{Increase in price }}{\text{Previous price}}*100\\\\=(25)/(125)*100\\\\=20\%`

Hence, the percent increase of your gas bill = 20%