-49.34% is the change from 604 to 306
Calculation steps:
[( 306 - 604 ) ÷ 604] x 100 = -49.34%
Formula
Percentage change = [(306 - 604) / 604] x 100
Subtract the new number by the original number
306 - 604 = -298
-298 ÷ 604 = -0.49337748344370863
-0.49337748344370863 x 100 = -49.34%