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YouTubeRon White Memory Expert - Memory Training & Brain Trainin
Trick to Calculate percentage (Math Hack)
Ron White, 2x USA Memory Champion finds a stranger on the street and teaches him this math hack to calculate percentages fast in your head. One of the fastest ways to calculate percentages mentally is to divide both the percentage and the number by 10, then multiply the results. This works because you're reducing both numbers by the same factor ...
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