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%
15%
35%

Explanation:

Step1: Calculate Energy Efficiency

First, use the formula \( \text{Energy Efficiency} = \frac{\text{Energy Output}}{\text{Energy Input}} \). Substitute the given values: Energy Output = 15 units, Energy Input = 100 units. So, \( \text{Energy Efficiency} = \frac{15}{100} = 0.15 \).

Step2: Calculate Energy Efficiency Percentage

Next, use the formula \( \text{Energy Efficiency}\% = \text{Energy Efficiency} \times 100 \). Substitute the value of Energy Efficiency from Step 1: \( 0.15 \times 100 = 15\% \).

Answer:

15% (corresponding to the option "15%")