-50.46% is the change from 434 to 215
Calculation steps:
[( 215 - 434 ) ÷ 434] x 100 = -50.46%
Formula
Percentage change = [(215 - 434) / 434] x 100
Subtract the new number by the original number
215 - 434 = -219
-219 ÷ 434 = -0.5046082949308756
-0.5046082949308756 x 100 = -50.46%