1700% is the change from 34 to 612
Calculation steps:
[( 612 - 34 ) ÷ 34] x 100 = 1700%
Formula
Percentage change = [(612 - 34) / 34] x 100
Subtract the new number by the original number
612 - 34 = 578
578 ÷ 34 = 17
17 x 100 = 1700%
Example