Answer:
Step-by-step explanation:
1st rectangle has an area of: h - horizontal sections * l - lateral sections.
A1 = 10 * 10 = 100 units squared
But only a fraction of them are colored.
72 / 100 are colored in the 1st rectangle.
The second has an area of: A2 = 10 * 1 = 10 units squared, but one row in the 2nd rectangle is the same as 10 units in the 1st so the area is still 100 units squared.
But the colored sections are 2/10 or 20/ 100.
Now we subtract 72/100 - 20/100 = 52/100 = 26/50 = 13/25 = 0.52 A
