66.19% is the change from 210 to 349
Calculation steps:
[( 349 - 210 ) ÷ 210] x 100 = 66.19%
Formula
Percentage change = [(349 - 210) / 210] x 100
Subtract the new number by the original number
349 - 210 = 139
139 ÷ 210 = 0.6619047619047619
0.6619047619047619 x 100 = 66.19%