422.45% is the change from 49 to 256
Calculation steps:
[( 256 - 49 ) ÷ 49] x 100 = 422.45%
Formula
Percentage change = [(256 - 49) / 49] x 100
Subtract the new number by the original number
256 - 49 = 207
207 ÷ 49 = 4.224489795918367
4.224489795918367 x 100 = 422.45%