-30.69% is the change from 606 to 420
Calculation steps:
[( 420 - 606 ) ÷ 606] x 100 = -30.69%
Formula
Percentage change = [(420 - 606) / 606] x 100
Subtract the new number by the original number
420 - 606 = -186
-186 ÷ 606 = -0.3069306930693069
-0.3069306930693069 x 100 = -30.69%