285.07% is the change from 221 to 851
Calculation steps:
[( 851 - 221 ) ÷ 221] x 100 = 285.07%
Formula
Percentage change = [(851 - 221) / 221] x 100
Subtract the new number by the original number
851 - 221 = 630
630 ÷ 221 = 2.8506787330316743
2.8506787330316743 x 100 = 285.07%