-51.37% is the change from 691 to 336
Calculation steps:
[( 336 - 691 ) ÷ 691] x 100 = -51.37%
Formula
Percentage change = [(336 - 691) / 691] x 100
Subtract the new number by the original number
336 - 691 = -355
-355 ÷ 691 = -0.5137481910274964
-0.5137481910274964 x 100 = -51.37%