286.88% is the change from 221 to 855
Calculation steps:
[( 855 - 221 ) ÷ 221] x 100 = 286.88%
Formula
Percentage change = [(855 - 221) / 221] x 100
Subtract the new number by the original number
855 - 221 = 634
634 ÷ 221 = 2.8687782805429864
2.8687782805429864 x 100 = 286.88%