-62.81% is the change from 691 to 257
Calculation steps:
[( 257 - 691 ) ÷ 691] x 100 = -62.81%
Formula
Percentage change = [(257 - 691) / 691] x 100
Subtract the new number by the original number
257 - 691 = -434
-434 ÷ 691 = -0.6280752532561505
-0.6280752532561505 x 100 = -62.81%