-25.9% is the change from 691 to 512
Calculation steps:
[( 512 - 691 ) ÷ 691] x 100 = -25.9%
Formula
Percentage change = [(512 - 691) / 691] x 100
Subtract the new number by the original number
512 - 691 = -179
-179 ÷ 691 = -0.2590448625180897
-0.2590448625180897 x 100 = -25.9%