How do you find the percent change if original: 15.6 liters and new: 11.4 liters?

1 Answer
Nov 6, 2015

x=26.92% With the c/o = x/100 method.

Explanation:

To get % of change, you use c/o = x/100, where c stands for the change between each number, and o stands for the original number. x is the percent you are trying to find, and is represented over 100 since percent is the ratio of 100.

So, the first step is to subtract each number from each other. 15.6 - 11.4 = 4.2. 4.2 is our c value wince it is the change between each number. And of course, o = 15.6 since that is the original value.

Now you can set up your equation. 4.2/15.6 = x/100. Through cross multiplication, you can say that 15.6x = 420.

Your last step, of course is to solve for x. Divide each side by 15.6, and that is your percent. x = 26.92%