-83.21% is the change from 685 to 115
Calculation steps:
[( 115 - 685 ) ÷ 685] x 100 = -83.21%
Formula
Percentage change = [(115 - 685) / 685] x 100
Subtract the new number by the original number
115 - 685 = -570
-570 ÷ 685 = -0.8321167883211679
-0.8321167883211679 x 100 = -83.21%