-46.99% is the change from 647 to 343
Calculation steps:
[( 343 - 647 ) ÷ 647] x 100 = -46.99%
Formula
Percentage change = [(343 - 647) / 647] x 100
Subtract the new number by the original number
343 - 647 = -304
-304 ÷ 647 = -0.46986089644513135
-0.46986089644513135 x 100 = -46.99%