We find the total area of the flag
Total area 190 ft^2
Next, we have 13 red and white stripes that have a height of 10/13 ft.
And 3 red stripes are 19 ft by 10/13 ft. So the area for a red stripe is:
Area a red stripe 14.61 ft^2
Also, we have 4 stripes that is (19 - 7 5/8)ft by 10/13 ft. Then, the area for a stripe is:
Area red stripe 8.75 ft^2
Therefore, the total area of red color of the flag is
Area of the flag is red 78.83 ft^2
Finally, we find the percentage,
190 ---> 100%
78.83 --> x %
Answer: percentage of the flag is red 41.5%