819.18% is the change from 73 to 671
Calculation steps:
[( 671 - 73 ) ÷ 73] x 100 = 819.18%
Formula
Percentage change = [(671 - 73) / 73] x 100
Subtract the new number by the original number
671 - 73 = 598
598 ÷ 73 = 8.191780821917808
8.191780821917808 x 100 = 819.18%