834.78% is the change from 23 to 215
Calculation steps:
[( 215 - 23 ) ÷ 23] x 100 = 834.78%
Formula
Percentage change = [(215 - 23) / 23] x 100
Subtract the new number by the original number
215 - 23 = 192
192 ÷ 23 = 8.347826086956522
8.347826086956522 x 100 = 834.78%