50.74% is the change from 406 to 612
Calculation steps:
[( 612 - 406 ) ÷ 406] x 100 = 50.74%
Formula
Percentage change = [(612 - 406) / 406] x 100
Subtract the new number by the original number
612 - 406 = 206
206 ÷ 406 = 0.5073891625615764
0.5073891625615764 x 100 = 50.74%