217% is the change from 100 to 317
Calculation steps:
[( 317 - 100 ) ÷ 100] x 100 = 217%
Formula
Percentage change = [(317 - 100) / 100] x 100
Subtract the new number by the original number
317 - 100 = 217
217 ÷ 100 = 2.17
2.17 x 100 = 217%
Example