19.52% is the change from 210 to 251
Calculation steps:
[( 251 - 210 ) ÷ 210] x 100 = 19.52%
Formula
Percentage change = [(251 - 210) / 210] x 100
Subtract the new number by the original number
251 - 210 = 41
41 ÷ 210 = 0.19523809523809524
0.19523809523809524 x 100 = 19.52%