21700% is the change from 1 to 218
Calculation steps:
[( 218 - 1 ) ÷ 1] x 100 = 21700%
Formula
Percentage change = [(218 - 1) / 1] x 100
Subtract the new number by the original number
218 - 1 = 217
217 ÷ 1 = 217
217 x 100 = 21700%
Example