-66.04% is the change from 636 to 216
Calculation steps:
[( 216 - 636 ) ÷ 636] x 100 = -66.04%
Formula
Percentage change = [(216 - 636) / 636] x 100
Subtract the new number by the original number
216 - 636 = -420
-420 ÷ 636 = -0.660377358490566
-0.660377358490566 x 100 = -66.04%