257.65% is the change from 85 to 304
Calculation steps:
[( 304 - 85 ) ÷ 85] x 100 = 257.65%
Formula
Percentage change = [(304 - 85) / 85] x 100
Subtract the new number by the original number
304 - 85 = 219
219 ÷ 85 = 2.5764705882352943
2.5764705882352943 x 100 = 257.65%