-47.75% is the change from 645 to 337
Calculation steps:
[( 337 - 645 ) ÷ 645] x 100 = -47.75%
Formula
Percentage change = [(337 - 645) / 645] x 100
Subtract the new number by the original number
337 - 645 = -308
-308 ÷ 645 = -0.47751937984496123
-0.47751937984496123 x 100 = -47.75%