-0.46% is the change from 217 to 216
Calculation steps:
[( 216 - 217 ) ÷ 217] x 100 = -0.46%
Formula
Percentage change = [(216 - 217) / 217] x 100
Subtract the new number by the original number
216 - 217 = -1
-1 ÷ 217 = -0.004608294930875576
-0.004608294930875576 x 100 = -0.46%