-48.11% is the change from 663 to 344
Calculation steps:
[( 344 - 663 ) ÷ 663] x 100 = -48.11%
Formula
Percentage change = [(344 - 663) / 663] x 100
Subtract the new number by the original number
344 - 663 = -319
-319 ÷ 663 = -0.48114630467571645
-0.48114630467571645 x 100 = -48.11%