-45.29% is the change from 393 to 215
Calculation steps:
[( 215 - 393 ) ÷ 393] x 100 = -45.29%
Formula
Percentage change = [(215 - 393) / 393] x 100
Subtract the new number by the original number
215 - 393 = -178
-178 ÷ 393 = -0.4529262086513995
-0.4529262086513995 x 100 = -45.29%