I was today years old when I found out percentages are reversible. So example 8% of 25 is the same as 25% of 8. Which makes it way easier to work out the first one. Call me simple but this has blown my mind
In multiplication order doesn't matter (commutative property). 5*3 is the same as 3*5. When you think about how % just stands for 1/100 it makes sense.
Another easier way to work out percentages is to multiply first and divide later. For your above example we can just say 8*25 = 200. Then we divide 200/100 and get 2. This makes trickier ones easier too. What's 5% of 17? Well 5*17 is 85, so it's 85/100 or 0.85
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