The site got the ribbons at $0.40, and sold them for $0.62.
The price went up by $0.22.
We can set up the equation like this:
x/100 = 0.62/0.40
The x/100 represents the percentage of 100, and the 0.62/0.40 represents the two prices, the new cost, or cost that the site is selling the spools for, over the original cost, the cost that the site got them for. The two are equal.
From here, you can solve 2 ways.
1.
You can simply divide 0.62/0.40, and the solution is 1.55. Then figure out what x needs to be for x/100 to equal 1.55.
2.
You can also multiply each numerator by the other denominator.
x * 0.4 = 0.4x
100 * 0.62 = 62
Now we have 0.4x = 62.
What does x have to be for 0.4 * x to equal 62?
Forgive me if I'm answering wrongly, do you mean what is the percentage of the difference of the prices ($0.22) from one of the prices ($0.62 or $0.40)?
