-47.74% is the change from 664 to 347
Calculation steps:
[( 347 - 664 ) ÷ 664] x 100 = -47.74%
Formula
Percentage change = [(347 - 664) / 664] x 100
Subtract the new number by the original number
347 - 664 = -317
-317 ÷ 664 = -0.47740963855421686
-0.47740963855421686 x 100 = -47.74%