write -9 9/16 as a decimal

-9 9/16 as a decimal is -9.5625.

To write -9 9/16 as a decimal, first we need to convert the mixed number (-9 9/16) into an improper fraction.

Step 1: Multiply the whole number (-9) by the denominator of the fraction, which is 16.
-9 * 16 = -144

Step 2: Add the product from step 1 to the numerator of the fraction.
-144 + 9 = -135

Step 3: Write the sum from step 2 as the numerator and keep the denominator the same.
The improper fraction is -135/16.

Step 4: Divide the numerator (-135) by the denominator (16) to convert the improper fraction into a decimal.
-135 ÷ 16 = -8.4375

Therefore, -9 9/16 can be written as a decimal as -8.4375.