Okay, so I’ve been messing around with fractions lately, and I stumbled upon this problem: “What is 3 of 21?” It seemed simple enough, but I wanted to make sure I understood it correctly.
First, I figured this was about finding a part of a whole. Like, if 21 is the whole pie, what’s 3 slices of that pie? I started by seeing if I could simplify the fraction 3/21. I thought, “What number goes into both 3 and 21?” Turns out, it’s 3! So, I divided both the top and bottom by 3.
- 3 divided by 3 is 1.
- 21 divided by 3 is 7.
That gave me the simplified fraction 1/7. Much easier to work with, right? It means that 3 is one-seventh of 21.

Then, I wanted to see this as a percentage. To do that, I know you gotta multiply the fraction by 100. So, I did 1/7 times 100. That’s the same as 100/7. When I did the division, I got something like 14.29%.
So, what did I learn? Basically, when you see “3 of 21,” it means you’re looking for a part of 21 that’s represented by the fraction 3/21. You can simplify that fraction to 1/7, and it is equivalent to around 14.29%. It’s all about breaking down the whole into parts and figuring out how much each part is worth. Fractions, man, they’re like puzzles that you can solve step-by-step.