-84.46% is the change from 502 to 78
Calculation steps:
[( 78 - 502 ) ÷ 502] x 100 = -84.46%
Formula
Percentage change = [(78 - 502) / 502] x 100
Subtract the new number by the original number
78 - 502 = -424
-424 ÷ 502 = -0.8446215139442231
-0.8446215139442231 x 100 = -84.46%