-37.1% is the change from 806 to 507
Calculation steps:
[( 507 - 806 ) ÷ 806] x 100 = -37.1%
Formula
Percentage change = [(507 - 806) / 806] x 100
Subtract the new number by the original number
507 - 806 = -299
-299 ÷ 806 = -0.3709677419354839
-0.3709677419354839 x 100 = -37.1%