-51.05% is the change from 621 to 304
Calculation steps:
[( 304 - 621 ) ÷ 621] x 100 = -51.05%
Formula
Percentage change = [(304 - 621) / 621] x 100
Subtract the new number by the original number
304 - 621 = -317
-317 ÷ 621 = -0.5104669887278583
-0.5104669887278583 x 100 = -51.05%