255% is the change from 260 to 923
Calculation steps:
[( 923 - 260 ) ÷ 260] x 100 = 255%
Formula
Percentage change = [(923 - 260) / 260] x 100
Subtract the new number by the original number
923 - 260 = 663
663 ÷ 260 = 2.55
2.55 x 100 = 255%
Example