Question

energy output = 25 units
energy input = 100 units
if you want to calculate energy efficiency,
what value should be substituted into the
green box?
? ÷ = energy efficiency
energy output ÷ energy input = energy efficiency
hint: enter a number.

Explanation:

Step1: Identify the formula for energy efficiency

The formula is \( \text{Energy Efficiency}=\frac{\text{Energy Output}}{\text{Energy Input}} \).

Step2: Substitute the given values

We are given that Energy Output \( = 25 \) units and Energy Input \( = 100 \) units. According to the formula, the value in the green box (numerator) should be the Energy Output.

Answer:

25