The Percentage Flip-It Trick! 🔄

Ever struggled to find a percentage like $16\%$ of $50$? What if there was a super-easy way to flip the numbers and make it simple?

Subject: mental-calculation • Classes: 6–12 • Difficulty: basic

The Trick

Imagine you need to calculate $A\%$ of $B$. The amazing 'Flip-It' trick says that this is exactly the same as calculating $B\%$ of $A$! This works because $A\%$ of $B = \frac{A}{100} \times B = \frac{A \times B}{100}$. And $B\%$ of $A = \frac{B}{100} \times A = \frac{B \times A}{100}$. Since multiplication is commutative ($A \times B = B \times A$), both expressions are identical. Choose the easier calculation!

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