52.53% is the change from 257 to 392
Calculation steps:
[( 392 - 257 ) ÷ 257] x 100 = 52.53%
Formula
Percentage change = [(392 - 257) / 257] x 100
Subtract the new number by the original number
392 - 257 = 135
135 ÷ 257 = 0.5252918287937743
0.5252918287937743 x 100 = 52.53%