x = used_amount_images * 100 / total_amount_images

time  | image   | zoom
time1 | 56.png  | 7
time2 | 11.png  | 7
time3 | 56.png  | 7
time4 | 23.png  | 7
time5 | 56.png  | 7
time6 | 56.png  | 7

x = used_amount_images * 100 / total_amount_images = 6 * 100 / 65 = 9.23%

x = used_amount_images * 100 / total_amount_images = 3 * 100 / 65 = 4.62%