310% is the change from 210 to 861
Calculation steps:
[( 861 - 210 ) ÷ 210] x 100 = 310%
Formula
Percentage change = [(861 - 210) / 210] x 100
Subtract the new number by the original number
861 - 210 = 651
651 ÷ 210 = 3.1
3.1 x 100 = 310%
Example