900% is the change from 34 to 340
Calculation steps:
[( 340 - 34 ) ÷ 34] x 100 = 900%
Formula
Percentage change = [(340 - 34) / 34] x 100
Subtract the new number by the original number
340 - 34 = 306
306 ÷ 34 = 9
9 x 100 = 900%
Example