-7.24% is the change from 691 to 641
Calculation steps:
[( 641 - 691 ) ÷ 691] x 100 = -7.24%
Formula
Percentage change = [(641 - 691) / 691] x 100
Subtract the new number by the original number
641 - 691 = -50
-50 ÷ 691 = -0.0723589001447178
-0.0723589001447178 x 100 = -7.24%