-46.82% is the change from 645 to 343
Calculation steps:
[( 343 - 645 ) ÷ 645] x 100 = -46.82%
Formula
Percentage change = [(343 - 645) / 645] x 100
Subtract the new number by the original number
343 - 645 = -302
-302 ÷ 645 = -0.4682170542635659
-0.4682170542635659 x 100 = -46.82%