-39.13% is the change from 667 to 406
Calculation steps:
[( 406 - 667 ) ÷ 667] x 100 = -39.13%
Formula
Percentage change = [(406 - 667) / 667] x 100
Subtract the new number by the original number
406 - 667 = -261
-261 ÷ 667 = -0.391304347826087
-0.391304347826087 x 100 = -39.13%