-85.57% is the change from 506 to 73
Calculation steps:
[( 73 - 506 ) ÷ 506] x 100 = -85.57%
Formula
Percentage change = [(73 - 506) / 506] x 100
Subtract the new number by the original number
73 - 506 = -433
-433 ÷ 506 = -0.8557312252964426
-0.8557312252964426 x 100 = -85.57%