-30.07% is the change from 612 to 428
Calculation steps:
[( 428 - 612 ) ÷ 612] x 100 = -30.07%
Formula
Percentage change = [(428 - 612) / 612] x 100
Subtract the new number by the original number
428 - 612 = -184
-184 ÷ 612 = -0.3006535947712418
-0.3006535947712418 x 100 = -30.07%