-48.04% is the change from 664 to 345
Calculation steps:
[( 345 - 664 ) ÷ 664] x 100 = -48.04%
Formula
Percentage change = [(345 - 664) / 664] x 100
Subtract the new number by the original number
345 - 664 = -319
-319 ÷ 664 = -0.48042168674698793
-0.48042168674698793 x 100 = -48.04%