670.59% is the change from 85 to 655
Calculation steps:
[( 655 - 85 ) ÷ 85] x 100 = 670.59%
Formula
Percentage change = [(655 - 85) / 85] x 100
Subtract the new number by the original number
655 - 85 = 570
570 ÷ 85 = 6.705882352941177
6.705882352941177 x 100 = 670.59%