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Overlapping Napkins

Solution Step 0/0
A square napkin that is 8 inches on a side overlaps a smaller square napkin that is only 4 inches on a side. The corner of the larger napkin falls exactly on the center of the smaller one.

What percentage of the smaller napkin is hidden?

Explanations

The larger napkin covers exactly 25% of the smaller one. The proof is shown in the diagram.
Check 35%
Check 30%
Check 25%
Check 20%

Puzzle Overlapping Napkins

Puzzle Overlapping Napkins