-87.74% is the change from 579 to 71
Calculation steps:
[( 71 - 579 ) ÷ 579] x 100 = -87.74%
Formula
Percentage change = [(71 - 579) / 579] x 100
Subtract the new number by the original number
71 - 579 = -508
-508 ÷ 579 = -0.8773747841105354
-0.8773747841105354 x 100 = -87.74%