-49.92% is the change from 609 to 305
Calculation steps:
[( 305 - 609 ) ÷ 609] x 100 = -49.92%
Formula
Percentage change = [(305 - 609) / 609] x 100
Subtract the new number by the original number
305 - 609 = -304
-304 ÷ 609 = -0.49917898193760263
-0.49917898193760263 x 100 = -49.92%