It helps to know that the root word “cent” means hundred. So percent means “per hundred”. The word is still often written separately as “per cent” in British English.
So 100% is a whole thing. It’s all of something.
50 percent, or 50 per hundred, is the same as 50/100 mathematically. It’s a division problem.
If the percentage is more than 100, such as 300%, that is more than one of something. Say you have 1 apple. If you increase your apples by 300% that means you have more than 1 apple now. 300% is mathematically the same as 300/100, so you have 3 apples.
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