-23.62% is the change from 669 to 511
Calculation steps:
[( 511 - 669 ) ÷ 669] x 100 = -23.62%
Formula
Percentage change = [(511 - 669) / 669] x 100
Subtract the new number by the original number
511 - 669 = -158
-158 ÷ 669 = -0.23617339312406577
-0.23617339312406577 x 100 = -23.62%