-30.88% is the change from 612 to 423
Calculation steps:
[( 423 - 612 ) ÷ 612] x 100 = -30.88%
Formula
Percentage change = [(423 - 612) / 612] x 100
Subtract the new number by the original number
423 - 612 = -189
-189 ÷ 612 = -0.3088235294117647
-0.3088235294117647 x 100 = -30.88%