45.71% is the change from 210 to 306
Calculation steps:
[( 306 - 210 ) ÷ 210] x 100 = 45.71%
Formula
Percentage change = [(306 - 210) / 210] x 100
Subtract the new number by the original number
306 - 210 = 96
96 ÷ 210 = 0.45714285714285713
0.45714285714285713 x 100 = 45.71%