-90.06% is the change from 503 to 50
Calculation steps:
[( 50 - 503 ) ÷ 503] x 100 = -90.06%
Formula
Percentage change = [(50 - 503) / 503] x 100
Subtract the new number by the original number
50 - 503 = -453
-453 ÷ 503 = -0.9005964214711729
-0.9005964214711729 x 100 = -90.06%