-84.51% is the change from 497 to 77
Calculation steps:
[( 77 - 497 ) ÷ 497] x 100 = -84.51%
Formula
Percentage change = [(77 - 497) / 497] x 100
Subtract the new number by the original number
77 - 497 = -420
-420 ÷ 497 = -0.8450704225352113
-0.8450704225352113 x 100 = -84.51%