11. What number is 20% of 64?

To find 20% of 64, multiply 64 by 0.20:
\[64 \times 0.20 = 12.8\]

Supplemental Knowledge:

Finding a percentage of a number is a common mathematical operation. It involves multiplying the number by the percentage (expressed as a decimal).

Steps for Calculation:
1. Convert the percentage to a decimal by dividing by 100.
2. Multiply the original number by this decimal.

Everyday Examples:

Calculating percentages can come in handy in various real-life situations, from finding something on sale for 20% less to quickly identifying sale prices without needing assistance from others. Knowing how to do it helps make life simpler when the situation arises!

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