-20.39% is the change from 667 to 531
Calculation steps:
[( 531 - 667 ) ÷ 667] x 100 = -20.39%
Formula
Percentage change = [(531 - 667) / 667] x 100
Subtract the new number by the original number
531 - 667 = -136
-136 ÷ 667 = -0.20389805097451275
-0.20389805097451275 x 100 = -20.39%