36 chairs are left
Solution:
Given that, 240 beach chairs are on sale
85% of the chairs are sold
To find: remaining chairs
Total number of chairs = 240
Number of chairs sold = 85 % of total chairs
Number of chairs sold = 85 % of 240

Thus 204 chairs are sold
Remaining chiars = total chairs - sold chairs
Remaining chairs = 240 - 204 = 36
Thus 36 chairs are left