-79.31% is the change from 493 to 102
Calculation steps:
[( 102 - 493 ) ÷ 493] x 100 = -79.31%
Formula
Percentage change = [(102 - 493) / 493] x 100
Subtract the new number by the original number
102 - 493 = -391
-391 ÷ 493 = -0.7931034482758621
-0.7931034482758621 x 100 = -79.31%