2311.11% is the change from 9 to 217
Calculation steps:
[( 217 - 9 ) ÷ 9] x 100 = 2311.11%
Formula
Percentage change = [(217 - 9) / 9] x 100
Subtract the new number by the original number
217 - 9 = 208
208 ÷ 9 = 23.11111111111111
23.11111111111111 x 100 = 2311.11%