252.94% is the change from 255 to 900
Calculation steps:
[( 900 - 255 ) ÷ 255] x 100 = 252.94%
Formula
Percentage change = [(900 - 255) / 255] x 100
Subtract the new number by the original number
900 - 255 = 645
645 ÷ 255 = 2.5294117647058822
2.5294117647058822 x 100 = 252.94%