302.94% is the change from 170 to 685
Calculation steps:
[( 685 - 170 ) ÷ 170] x 100 = 302.94%
Formula
Percentage change = [(685 - 170) / 170] x 100
Subtract the new number by the original number
685 - 170 = 515
515 ÷ 170 = 3.0294117647058822
3.0294117647058822 x 100 = 302.94%