So step one is to just multiply that Part by 100. Let's try it out on our problem about the marbles, that's very simple and it's just two steps! We know that the "Part" (red marbles) is 10. If we take the "Part" and multiply it by 100, and then we divide that by the "Percent", we will get the "Total". Here is the way to figure out what the Total is:īy using a simple algebra we can re-arrange our Percent equation like this: So, that means that it must be the Total that's missing.
How To: In this problem, we know that the Percent is 20, and we are also told that the Part of the marbles is red, so we know that the Part is 10. How many marbles does he have altogether? Question: Your friend has a bag of marbles, and he tells you that 20 percent of the marbles are red.
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