300% is the change from 170 to 680
Calculation steps:
[( 680 - 170 ) ÷ 170] x 100 = 300%
Formula
Percentage change = [(680 - 170) / 170] x 100
Subtract the new number by the original number
680 - 170 = 510
510 ÷ 170 = 3
3 x 100 = 300%
Example