-51.83% is the change from 654 to 315
Calculation steps:
[( 315 - 654 ) ÷ 654] x 100 = -51.83%
Formula
Percentage change = [(315 - 654) / 654] x 100
Subtract the new number by the original number
315 - 654 = -339
-339 ÷ 654 = -0.518348623853211
-0.518348623853211 x 100 = -51.83%