-38.68% is the change from 817 to 501
Calculation steps:
[( 501 - 817 ) ÷ 817] x 100 = -38.68%
Formula
Percentage change = [(501 - 817) / 817] x 100
Subtract the new number by the original number
501 - 817 = -316
-316 ÷ 817 = -0.386780905752754
-0.386780905752754 x 100 = -38.68%