78.82% is the change from 170 to 304
Calculation steps:
[( 304 - 170 ) ÷ 170] x 100 = 78.82%
Formula
Percentage change = [(304 - 170) / 170] x 100
Subtract the new number by the original number
304 - 170 = 134
134 ÷ 170 = 0.788235294117647
0.788235294117647 x 100 = 78.82%