This may not be the easiest way to do it but it is what works for my brain. First, take 300 and divide it by 100, in this case your answer would be 3. Then you take your answer to that problem "3" and multiply it by the percent needing to be found, in this case it's 72%. So your problem is 72(3) which =216
216 is 72% of 300
Hope this makes sense to you and hope it helps