if the price of an item goes up from $70 to $84 what was the percent of increase?

Question

math 

Answer 1

When a price goes up, this means that there is a tax that causes the increase.

 

Let x = increase in decimal

 

 

Set up equation using the variable.

 

70 + 70x = 84

 

 

Subtract 70 on both sides of equation.

 

70x = 14

 

 

Divide both sides of equation by 70.

 

x = 0.20

 

 

Next, multiply this value by 100 to get the percent.

 

The percent increase is 20%.