287.5% is the change from 256 to 992
Calculation steps:
[( 992 - 256 ) ÷ 256] x 100 = 287.5%
Formula
Percentage change = [(992 - 256) / 256] x 100
Subtract the new number by the original number
992 - 256 = 736
736 ÷ 256 = 2.875
2.875 x 100 = 287.5%
Example