-85.2% is the change from 500 to 74
Calculation steps:
[( 74 - 500 ) ÷ 500] x 100 = -85.2%
Formula
Percentage change = [(74 - 500) / 500] x 100
Subtract the new number by the original number
74 - 500 = -426
-426 ÷ 500 = -0.852
-0.852 x 100 = -85.2%
Example