877.27% is the change from 66 to 645
Calculation steps:
[( 645 - 66 ) ÷ 66] x 100 = 877.27%
Formula
Percentage change = [(645 - 66) / 66] x 100
Subtract the new number by the original number
645 - 66 = 579
579 ÷ 66 = 8.772727272727273
8.772727272727273 x 100 = 877.27%