What's 30 of 30?

A simple calculation, right? Just divide 30 by 30 and you get 1. But let's dive a little deeper here. In the world of mathematics, percentage calculations are super handy. They help us understand proportions and relative values. So, when you see the question "What's 30 of 30?", what they're really asking is, "What's 30% of 30?".

When you calculate 30% of 30, you're looking for the number that makes up 30 tenths of a whole. So, you take 30, which is our whole, and move the decimal point one place to the left. That gives you 3. Then, you multiply that by 10, since we're talking about tenths. So, 3 times 10 equals 30. And there you have it, 30 is 30% of 30.

But what if you're asked about 30% of 30? That's a bit trickier. You see, 30% is like a discount or a Fraction of 30. So, you take 30 and move the decimal point two places to the left. Now you have 0.3. But that's not quite right because we want 30%. To fix that, you flip the decimal point back to the right. That gives you 30, which is exactly what we started with.

So, to summarize, when you see "What's 30 of 30?" you should think "30% of 30". And when you see "30% of 30?" you should think "30 of 30". Both are super useful calculations in their own way.