How do you find 0.5% of 250?
1) Convert that percentage to either fraction or decimal:
2) Simply multiply your result by the total number
which in this case is 250:
The way I always try to do it (which can be a real challenge and you can do it even in your head if you practise a little) is:
I simply look at the total number, which is 250, and think
"what is 1% of that number?" (which is same as dividing by 100).
In this case it is
We know that the question is asking for
It should be easy enough to know
So you just divide the answer of
As you can see it is the same number as in the first method.
Word of caution: This method will get more difficult if the numbers aren't so easy and straight forward. So for example if it asked for 43% of 250, then I encourage you to follow the first method.
Hope this helped (c: