-37.04% is the change from 818 to 515
Calculation steps:
[( 515 - 818 ) ÷ 818] x 100 = -37.04%
Formula
Percentage change = [(515 - 818) / 818] x 100
Subtract the new number by the original number
515 - 818 = -303
-303 ÷ 818 = -0.3704156479217604
-0.3704156479217604 x 100 = -37.04%