To find out what number 16 is 50% of, you can use the formula:
\[ \text{Number} = \frac{\text{Part}}{\text{Percentage}} \]
In this case, the part is 16 and the percentage is 50% (or 0.5 when expressed as a decimal).
\[ \text{Number} = \frac{16}{0.5} = 32 \]
Thus, 16 is 50% of 32.