-49.76% is the change from 627 to 315
Calculation steps:
[( 315 - 627 ) ÷ 627] x 100 = -49.76%
Formula
Percentage change = [(315 - 627) / 627] x 100
Subtract the new number by the original number
315 - 627 = -312
-312 ÷ 627 = -0.49760765550239233
-0.49760765550239233 x 100 = -49.76%