Easy Percentage Trick you were Never Taught at School!

This percentage trick is so easy - but you probably don't know it...because, let's face it, you were not paying attention in school when the teacher told you!
That's OK - youtube and tecmath has your back - with this, the easiest percentage trick you were EVER taught in school!

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More percentage tricks: https://www.youtube.com/watch?v=8fG9nbVV9g4&list=PLjbxBzUM6SLn7pLTxrksJjlHoLY8aOcGk&index=7