-24.82% is the change from 685 to 515
Calculation steps:
[( 515 - 685 ) ÷ 685] x 100 = -24.82%
Formula
Percentage change = [(515 - 685) / 685] x 100
Subtract the new number by the original number
515 - 685 = -170
-170 ÷ 685 = -0.24817518248175183
-0.24817518248175183 x 100 = -24.82%