272.4% is the change from 221 to 823
Calculation steps:
[( 823 - 221 ) ÷ 221] x 100 = 272.4%
Formula
Percentage change = [(823 - 221) / 221] x 100
Subtract the new number by the original number
823 - 221 = 602
602 ÷ 221 = 2.723981900452489
2.723981900452489 x 100 = 272.4%