Step 1
Find out how many chairs are already taken. Multiply the tables by the chairs
\(6*6=36\)
Step 2
By using proportion find the percentage
\(\frac{150}{100} =\frac{36}{x} \\ \\ 150*x=36*100\\\\ x= \frac{3600}{150} \\ \\ x=24\)
therefore
the answer is
\(24\)%