-17.96% is the change from 813 to 667
Calculation steps:
[( 667 - 813 ) ÷ 813] x 100 = -17.96%
Formula
Percentage change = [(667 - 813) / 813] x 100
Subtract the new number by the original number
667 - 813 = -146
-146 ÷ 813 = -0.1795817958179582
-0.1795817958179582 x 100 = -17.96%