815.15% is the change from 66 to 604
Calculation steps:
[( 604 - 66 ) ÷ 66] x 100 = 815.15%
Formula
Percentage change = [(604 - 66) / 66] x 100
Subtract the new number by the original number
604 - 66 = 538
538 ÷ 66 = 8.151515151515152
8.151515151515152 x 100 = 815.15%