-90.74% is the change from 691 to 64
Calculation steps:
[( 64 - 691 ) ÷ 691] x 100 = -90.74%
Formula
Percentage change = [(64 - 691) / 691] x 100
Subtract the new number by the original number
64 - 691 = -627
-627 ÷ 691 = -0.9073806078147613
-0.9073806078147613 x 100 = -90.74%