-85.49% is the change from 503 to 73
Calculation steps:
[( 73 - 503 ) ÷ 503] x 100 = -85.49%
Formula
Percentage change = [(73 - 503) / 503] x 100
Subtract the new number by the original number
73 - 503 = -430
-430 ÷ 503 = -0.8548707753479126
-0.8548707753479126 x 100 = -85.49%