A furnace repair team services a design capacity of 6 furnaces per day with an effective capacity of 5 furnaces per day. What is its efficiency if it repairs an average of 4 furnaces per day?

66.7%

Explanation:

Given that,

Design capacity = 6 furnaces per day

Effective capacity = 5 furnaces per day

Efficiency ratio if it repairs an average of 4 furnaces per day:

= (Actual capacity : Possible capacity) * 100

= (4 per day : 6 per day) * 100

= 0.667 * 100

= 66.7%

Therefore, the efficiency ratio is 66.7 percent.