-48.42% is the change from 665 to 343
Calculation steps:
[( 343 - 665 ) ÷ 665] x 100 = -48.42%
Formula
Percentage change = [(343 - 665) / 665] x 100
Subtract the new number by the original number
343 - 665 = -322
-322 ÷ 665 = -0.4842105263157895
-0.4842105263157895 x 100 = -48.42%