-25.15% is the change from 684 to 512
Calculation steps:
[( 512 - 684 ) ÷ 684] x 100 = -25.15%
Formula
Percentage change = [(512 - 684) / 684] x 100
Subtract the new number by the original number
512 - 684 = -172
-172 ÷ 684 = -0.25146198830409355
-0.25146198830409355 x 100 = -25.15%