-51.12% is the change from 624 to 305
Calculation steps:
[( 305 - 624 ) ÷ 624] x 100 = -51.12%
Formula
Percentage change = [(305 - 624) / 624] x 100
Subtract the new number by the original number
305 - 624 = -319
-319 ÷ 624 = -0.5112179487179487
-0.5112179487179487 x 100 = -51.12%