-37.09% is the change from 666 to 419
Calculation steps:
[( 419 - 666 ) ÷ 666] x 100 = -37.09%
Formula
Percentage change = [(419 - 666) / 666] x 100
Subtract the new number by the original number
419 - 666 = -247
-247 ÷ 666 = -0.3708708708708709
-0.3708708708708709 x 100 = -37.09%