-45.89% is the change from 645 to 349
Calculation steps:
[( 349 - 645 ) ÷ 645] x 100 = -45.89%
Formula
Percentage change = [(349 - 645) / 645] x 100
Subtract the new number by the original number
349 - 645 = -296
-296 ÷ 645 = -0.45891472868217054
-0.45891472868217054 x 100 = -45.89%