-23.39% is the change from 667 to 511
Calculation steps:
[( 511 - 667 ) ÷ 667] x 100 = -23.39%
Formula
Percentage change = [(511 - 667) / 667] x 100
Subtract the new number by the original number
511 - 667 = -156
-156 ÷ 667 = -0.23388305847076463
-0.23388305847076463 x 100 = -23.39%