-75.22% is the change from 690 to 171
Calculation steps:
[( 171 - 690 ) ÷ 690] x 100 = -75.22%
Formula
Percentage change = [(171 - 690) / 690] x 100
Subtract the new number by the original number
171 - 690 = -519
-519 ÷ 690 = -0.7521739130434782
-0.7521739130434782 x 100 = -75.22%