The following table shows the numbers of chairs made of plastic and of steel in 5 different colours that were sold from a furniture showroom during a sale.

The total number of chairs of colour C3 sold are what percentage of all the chairs of these 5 colours sold, both plastic and steel ones put together? [Give your answer correct to 2 decimal places.]

20.75%

Total chairs sold of C3 = 8 + 14 = 22

Total number of chairs of both plastic and steel = 10 + 12 + 12 + 6 + 8 + 14 + 6 + 18 + 9 + 11

= 106

Required percentage = \(\frac{22 }{106}\) × 100

= 20.75%