-54.74% is the change from 475 to 215
Calculation steps:
[( 215 - 475 ) ÷ 475] x 100 = -54.74%
Formula
Percentage change = [(215 - 475) / 475] x 100
Subtract the new number by the original number
215 - 475 = -260
-260 ÷ 475 = -0.5473684210526316
-0.5473684210526316 x 100 = -54.74%