158.2% is the change from 256 to 661
Calculation steps:
[( 661 - 256 ) ÷ 256] x 100 = 158.2%
Formula
Percentage change = [(661 - 256) / 256] x 100
Subtract the new number by the original number
661 - 256 = 405
405 ÷ 256 = 1.58203125
1.58203125 x 100 = 158.2%