Question

energy output = 25 units
energy input = 100 units
what is the energy efficiency?
25 ÷ 100 = ?
energy output ÷ energy input = energy efficiency
hint: enter a number.

Explanation:

Step1: Recall efficiency formula

Energy Efficiency = $\frac{\text{Energy Output}}{\text{Energy Input}}$

Step2: Substitute given values

Energy Efficiency = $\frac{25}{100}$

Step3: Calculate the value

$\frac{25}{100} = 0.25$
(Alternatively, this can also be expressed as 25% if percentage is requested, but the decimal is the direct numerical result.)

Answer:

0.25