1900% is the change from 17 to 340
Calculation steps:
[( 340 - 17 ) ÷ 17] x 100 = 1900%
Formula
Percentage change = [(340 - 17) / 17] x 100
Subtract the new number by the original number
340 - 17 = 323
323 ÷ 17 = 19
19 x 100 = 1900%
Example