264.84% is the change from 256 to 934
Calculation steps:
[( 934 - 256 ) ÷ 256] x 100 = 264.84%
Formula
Percentage change = [(934 - 256) / 256] x 100
Subtract the new number by the original number
934 - 256 = 678
678 ÷ 256 = 2.6484375
2.6484375 x 100 = 264.84%