238.1% is the change from 210 to 710
Calculation steps:
[( 710 - 210 ) ÷ 210] x 100 = 238.1%
Formula
Percentage change = [(710 - 210) / 210] x 100
Subtract the new number by the original number
710 - 210 = 500
500 ÷ 210 = 2.380952380952381
2.380952380952381 x 100 = 238.1%