-49.65% is the change from 427 to 215
Calculation steps:
[( 215 - 427 ) ÷ 427] x 100 = -49.65%
Formula
Percentage change = [(215 - 427) / 427] x 100
Subtract the new number by the original number
215 - 427 = -212
-212 ÷ 427 = -0.4964871194379391
-0.4964871194379391 x 100 = -49.65%