50.57% is the change from 265 to 399
Calculation steps:
[( 399 - 265 ) ÷ 265] x 100 = 50.57%
Formula
Percentage change = [(399 - 265) / 265] x 100
Subtract the new number by the original number
399 - 265 = 134
134 ÷ 265 = 0.5056603773584906
0.5056603773584906 x 100 = 50.57%