843.94% is the change from 66 to 623
Calculation steps:
[( 623 - 66 ) ÷ 66] x 100 = 843.94%
Formula
Percentage change = [(623 - 66) / 66] x 100
Subtract the new number by the original number
623 - 66 = 557
557 ÷ 66 = 8.43939393939394
8.43939393939394 x 100 = 843.94%