Count the total number of small squares in the rectangle, then count how many are NOT shaded.<br><br>
&bull; The rectangle is divided into a grid with equal squares<br>
&bull; 76 out of 100 squares are not shaded<br>
&bull; Percentage not shaded = 76 ÷ 100 × 100% = 76%<br><br>
Final Answer: 76