424.49% is the change from 49 to 257
Calculation steps:
[( 257 - 49 ) ÷ 49] x 100 = 424.49%
Formula
Percentage change = [(257 - 49) / 49] x 100
Subtract the new number by the original number
257 - 49 = 208
208 ÷ 49 = 4.244897959183674
4.244897959183674 x 100 = 424.49%