-45.72% is the change from 643 to 349
Calculation steps:
[( 349 - 643 ) ÷ 643] x 100 = -45.72%
Formula
Percentage change = [(349 - 643) / 643] x 100
Subtract the new number by the original number
349 - 643 = -294
-294 ÷ 643 = -0.4572317262830482
-0.4572317262830482 x 100 = -45.72%