874.24% is the change from 66 to 643
Calculation steps:
[( 643 - 66 ) ÷ 66] x 100 = 874.24%
Formula
Percentage change = [(643 - 66) / 66] x 100
Subtract the new number by the original number
643 - 66 = 577
577 ÷ 66 = 8.742424242424242
8.742424242424242 x 100 = 874.24%