To convert 1650 to a decimal, it is already in decimal format since it is a whole number. So, as a decimal, it is 1650.0.
To convert 1650 to a percentage, you multiply it by 100. Thus, it becomes:
\[ 1650 \times 100 = 165000% \]
So, the conversions are:
- Decimal: 1650.0
- Percentage: 165000%