-99.54% is the change from 216 to 1
Calculation steps:
[( 1 - 216 ) ÷ 216] x 100 = -99.54%
Formula
Percentage change = [(1 - 216) / 216] x 100
Subtract the new number by the original number
1 - 216 = -215
-215 ÷ 216 = -0.9953703703703703
-0.9953703703703703 x 100 = -99.54%