-18.7% is the change from 818 to 665
Calculation steps:
[( 665 - 818 ) ÷ 818] x 100 = -18.7%
Formula
Percentage change = [(665 - 818) / 818] x 100
Subtract the new number by the original number
665 - 818 = -153
-153 ÷ 818 = -0.18704156479217604
-0.18704156479217604 x 100 = -18.7%