-50.33% is the change from 612 to 304
Calculation steps:
[( 304 - 612 ) ÷ 612] x 100 = -50.33%
Formula
Percentage change = [(304 - 612) / 612] x 100
Subtract the new number by the original number
304 - 612 = -308
-308 ÷ 612 = -0.5032679738562091
-0.5032679738562091 x 100 = -50.33%