-74.74% is the change from 685 to 173
Calculation steps:
[( 173 - 685 ) ÷ 685] x 100 = -74.74%
Formula
Percentage change = [(173 - 685) / 685] x 100
Subtract the new number by the original number
173 - 685 = -512
-512 ÷ 685 = -0.7474452554744525
-0.7474452554744525 x 100 = -74.74%