294.29% is the change from 210 to 828
Calculation steps:
[( 828 - 210 ) ÷ 210] x 100 = 294.29%
Formula
Percentage change = [(828 - 210) / 210] x 100
Subtract the new number by the original number
828 - 210 = 618
618 ÷ 210 = 2.942857142857143
2.942857142857143 x 100 = 294.29%