865.15% is the change from 66 to 637
Calculation steps:
[( 637 - 66 ) ÷ 66] x 100 = 865.15%
Formula
Percentage change = [(637 - 66) / 66] x 100
Subtract the new number by the original number
637 - 66 = 571
571 ÷ 66 = 8.651515151515152
8.651515151515152 x 100 = 865.15%