Question

energy output + energy input = energy efficiency
energy efficiency × 100 = energy efficiency%
energy output = 15 units
energy input = 100 units
what is the energy efficiency percentage?
99%
35%
15%

Explanation:

Step1: Calculate energy efficiency

Energy efficiency = Energy Output ÷ Energy Input
$$\frac{15}{100}=0.15$$

Step2: Convert to percentage

Energy efficiency% = Energy efficiency × 100
$$0.15\times100 = 15$$

Answer:

15%