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?
15%
35%
99%

Explanation:

Step1: Calculate energy efficiency

Energy efficiency = Energy Output ÷ Energy Input.
Given Energy Output = 15 units and Energy Input = 100 units.
So, Energy efficiency = $\frac{15}{100}=0.15$.

Step2: Calculate energy efficiency percentage

Energy efficiency percentage = Energy efficiency × 100.
Substitute Energy efficiency = 0.15.
Energy efficiency percentage = $0.15\times100 = 15\%$.

Answer:

15%