Question

energy output ÷ energy input = energy efficiency
energy efficiency × 100 = energy efficiency%
energy output = 5 units
energy input = 100 units
what is the energy efficiency percentage?
5%
15%
95%

Explanation:

Step1: Calculate energy efficiency

Energy efficiency = Energy Output ÷ Energy Input = $\frac{5}{100}=0.05$

Step2: Convert to percentage

Energy efficiency% = Energy efficiency × 100 = $0.05\times100 = 5\%$

Answer:

5%