77.78% is the change from 171 to 304
Calculation steps:
[( 304 - 171 ) ÷ 171] x 100 = 77.78%
Formula
Percentage change = [(304 - 171) / 171] x 100
Subtract the new number by the original number
304 - 171 = 133
133 ÷ 171 = 0.7777777777777778
0.7777777777777778 x 100 = 77.78%