-75.25% is the change from 691 to 171
Calculation steps:
[( 171 - 691 ) ÷ 691] x 100 = -75.25%
Formula
Percentage change = [(171 - 691) / 691] x 100
Subtract the new number by the original number
171 - 691 = -520
-520 ÷ 691 = -0.7525325615050651
-0.7525325615050651 x 100 = -75.25%