280% is the change from 210 to 798
Calculation steps:
[( 798 - 210 ) ÷ 210] x 100 = 280%
Formula
Percentage change = [(798 - 210) / 210] x 100
Subtract the new number by the original number
798 - 210 = 588
588 ÷ 210 = 2.8
2.8 x 100 = 280%
Example