1. The problem asks to write $9^2$ as a percentage. 2. First, calculate $9^2$ which means $9 \times 9$. 3. $$9^2 = 81$$ 4. To write 81 as a percentage, recall that a percentage is a number out of 100. 5. Since 81 is already out of 100, it can be written as 81%. Final answer: $$81\%$$