198.44% is the change from 256 to 764
Calculation steps:
[( 764 - 256 ) ÷ 256] x 100 = 198.44%
Formula
Percentage change = [(764 - 256) / 256] x 100
Subtract the new number by the original number
764 - 256 = 508
508 ÷ 256 = 1.984375
1.984375 x 100 = 198.44%