277.65% is the change from 85 to 321
Calculation steps:
[( 321 - 85 ) ÷ 85] x 100 = 277.65%
Formula
Percentage change = [(321 - 85) / 85] x 100
Subtract the new number by the original number
321 - 85 = 236
236 ÷ 85 = 2.776470588235294
2.776470588235294 x 100 = 277.65%