21600% is the change from 1 to 217
Calculation steps:
[( 217 - 1 ) ÷ 1] x 100 = 21600%
Formula
Percentage change = [(217 - 1) / 1] x 100
Subtract the new number by the original number
217 - 1 = 216
216 ÷ 1 = 216
216 x 100 = 21600%
Example