-49.59% is the change from 609 to 307
Calculation steps:
[( 307 - 609 ) ÷ 609] x 100 = -49.59%
Formula
Percentage change = [(307 - 609) / 609] x 100
Subtract the new number by the original number
307 - 609 = -302
-302 ÷ 609 = -0.49589490968801314
-0.49589490968801314 x 100 = -49.59%