-49.84% is the change from 628 to 315
Calculation steps:
[( 315 - 628 ) ÷ 628] x 100 = -49.84%
Formula
Percentage change = [(315 - 628) / 628] x 100
Subtract the new number by the original number
315 - 628 = -313
-313 ÷ 628 = -0.4984076433121019
-0.4984076433121019 x 100 = -49.84%