689.41% is the change from 85 to 671
Calculation steps:
[( 671 - 85 ) ÷ 85] x 100 = 689.41%
Formula
Percentage change = [(671 - 85) / 85] x 100
Subtract the new number by the original number
671 - 85 = 586
586 ÷ 85 = 6.894117647058824
6.894117647058824 x 100 = 689.41%