Question

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

Answer 1

`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%`