-78.33% is the change from 503 to 109
Calculation steps:
[( 109 - 503 ) ÷ 503] x 100 = -78.33%
Formula
Percentage change = [(109 - 503) / 503] x 100
Subtract the new number by the original number
109 - 503 = -394
-394 ÷ 503 = -0.7833001988071571
-0.7833001988071571 x 100 = -78.33%