-31.5% is the change from 1000 to 685
Calculation steps:
[( 685 - 1000 ) ÷ 1000] x 100 = -31.5%
Formula
Percentage change = [(685 - 1000) / 1000] x 100
Subtract the new number by the original number
685 - 1000 = -315
-315 ÷ 1000 = -0.315
-0.315 x 100 = -31.5%