-48.27% is the change from 663 to 343
Calculation steps:
[( 343 - 663 ) ÷ 663] x 100 = -48.27%
Formula
Percentage change = [(343 - 663) / 663] x 100
Subtract the new number by the original number
343 - 663 = -320
-320 ÷ 663 = -0.48265460030165913
-0.48265460030165913 x 100 = -48.27%