291.9% is the change from 210 to 823
Calculation steps:
[( 823 - 210 ) ÷ 210] x 100 = 291.9%
Formula
Percentage change = [(823 - 210) / 210] x 100
Subtract the new number by the original number
823 - 210 = 613
613 ÷ 210 = 2.919047619047619
2.919047619047619 x 100 = 291.9%