-45.12% is the change from 645 to 354
Calculation steps:
[( 354 - 645 ) ÷ 645] x 100 = -45.12%
Formula
Percentage change = [(354 - 645) / 645] x 100
Subtract the new number by the original number
354 - 645 = -291
-291 ÷ 645 = -0.4511627906976744
-0.4511627906976744 x 100 = -45.12%