-84.26% is the change from 502 to 79
Calculation steps:
[( 79 - 502 ) ÷ 502] x 100 = -84.26%
Formula
Percentage change = [(79 - 502) / 502] x 100
Subtract the new number by the original number
79 - 502 = -423
-423 ÷ 502 = -0.8426294820717132
-0.8426294820717132 x 100 = -84.26%