21500% is the change from 1 to 216
Calculation steps:
[( 216 - 1 ) ÷ 1] x 100 = 21500%
Formula
Percentage change = [(216 - 1) / 1] x 100
Subtract the new number by the original number
216 - 1 = 215
215 ÷ 1 = 215
215 x 100 = 21500%
Example