24.29% is the change from 210 to 261
Calculation steps:
[( 261 - 210 ) ÷ 210] x 100 = 24.29%
Formula
Percentage change = [(261 - 210) / 210] x 100
Subtract the new number by the original number
261 - 210 = 51
51 ÷ 210 = 0.24285714285714285
0.24285714285714285 x 100 = 24.29%