401.96% is the change from 51 to 256
Calculation steps:
[( 256 - 51 ) ÷ 51] x 100 = 401.96%
Formula
Percentage change = [(256 - 51) / 51] x 100
Subtract the new number by the original number
256 - 51 = 205
205 ÷ 51 = 4.019607843137255
4.019607843137255 x 100 = 401.96%