-87.38% is the change from 610 to 77
Calculation steps:
[( 77 - 610 ) ÷ 610] x 100 = -87.38%
Formula
Percentage change = [(77 - 610) / 610] x 100
Subtract the new number by the original number
77 - 610 = -533
-533 ÷ 610 = -0.8737704918032787
-0.8737704918032787 x 100 = -87.38%