The diagram shows a square with perimeter 20cm.work out the percentage of the area inside the square that is shaded

Answer:
16.25 cm squared
Step-by-step explanation:
20 ÷ 4 = 5
5 - 3 = 2
5 - 3.5 = 1.5
1.5 × 5 = 7.5
2 × 5= 10
7.5 ÷ 2 = 3.75
10 ÷ 2 = 5
3.75 + 5 = 8.75
5 × 5 = 25
25 - 8.75 = 16.25