-74.35% is the change from 503 to 129
Calculation steps:
[( 129 - 503 ) ÷ 503] x 100 = -74.35%
Formula
Percentage change = [(129 - 503) / 503] x 100
Subtract the new number by the original number
129 - 503 = -374
-374 ÷ 503 = -0.7435387673956262
-0.7435387673956262 x 100 = -74.35%