Answer:
Increased by 37.5%
Step-by-step explanation:
1. Approach
First, find the amount by which the bill increased. This can be found by subtracting the final amount from the previous amount. Then set up a proportion to find out the percent by which the bill increased. Remember, a proportion is;
[tex]\frac{part}{whole} = \frac{percent}{100}[/tex]
2. Find the increase
Subtract the bill in March from the bill in June;
June - March
110 - 80
= 30
3. Find the percent change
In this case, these are the value which will be used;
[tex]\frac{increase}{March} = \frac{percent}{100}[/tex]
[tex]\frac{30}{80} = \frac{percent}{100}[/tex]
80 percent = 3000
percent = 37.5
