To determine the equation that represents the unit fraction shown in the diagram, let's analyze the information given:
- You have a grid model with 100 squares.
- Out of those, 20 squares are shaded.
To express this as a fraction, you can use the following:
\[ \frac{20}{100} \]
Now, simplifying \(\frac{20}{100}\):
\[ \frac{20 \div 20}{100 \div 20} = \frac{1}{5} \]
Thus, \(\frac{20}{100}\) simplifies to \(\frac{1}{5}\).
From the provided options, the correct equation that represents the unit fraction shown in the diagram is:
\[ \frac{20}{100} = \frac{1}{5} \]
So the answer is:
StartFraction 20 Over 100 EndFraction = one-fifth