-27.5% is the change from 691 to 501
Calculation steps:
[( 501 - 691 ) ÷ 691] x 100 = -27.5%
Formula
Percentage change = [(501 - 691) / 691] x 100
Subtract the new number by the original number
501 - 691 = -190
-190 ÷ 691 = -0.27496382054992763
-0.27496382054992763 x 100 = -27.5%