-52.56% is the change from 664 to 315
Calculation steps:
[( 315 - 664 ) ÷ 664] x 100 = -52.56%
Formula
Percentage change = [(315 - 664) / 664] x 100
Subtract the new number by the original number
315 - 664 = -349
-349 ÷ 664 = -0.5256024096385542
-0.5256024096385542 x 100 = -52.56%