121.57% is the change from 255 to 565
Calculation steps:
[( 565 - 255 ) ÷ 255] x 100 = 121.57%
Formula
Percentage change = [(565 - 255) / 255] x 100
Subtract the new number by the original number
565 - 255 = 310
310 ÷ 255 = 1.2156862745098038
1.2156862745098038 x 100 = 121.57%