166.36% is the change from 321 to 855
Calculation steps:
[( 855 - 321 ) ÷ 321] x 100 = 166.36%
Formula
Percentage change = [(855 - 321) / 321] x 100
Subtract the new number by the original number
855 - 321 = 534
534 ÷ 321 = 1.6635514018691588
1.6635514018691588 x 100 = 166.36%