-38.58% is the change from 661 to 406
Calculation steps:
[( 406 - 661 ) ÷ 661] x 100 = -38.58%
Formula
Percentage change = [(406 - 661) / 661] x 100
Subtract the new number by the original number
406 - 661 = -255
-255 ÷ 661 = -0.3857791225416036
-0.3857791225416036 x 100 = -38.58%