-63.1% is the change from 691 to 255
Calculation steps:
[( 255 - 691 ) ÷ 691] x 100 = -63.1%
Formula
Percentage change = [(255 - 691) / 691] x 100
Subtract the new number by the original number
255 - 691 = -436
-436 ÷ 691 = -0.6309696092619392
-0.6309696092619392 x 100 = -63.1%