294.12% is the change from 170 to 670
Calculation steps:
[( 670 - 170 ) ÷ 170] x 100 = 294.12%
Formula
Percentage change = [(670 - 170) / 170] x 100
Subtract the new number by the original number
670 - 170 = 500
500 ÷ 170 = 2.9411764705882355
2.9411764705882355 x 100 = 294.12%