14.29% is the change from 210 to 240
Calculation steps:
[( 240 - 210 ) ÷ 210] x 100 = 14.29%
Formula
Percentage change = [(240 - 210) / 210] x 100
Subtract the new number by the original number
240 - 210 = 30
30 ÷ 210 = 0.14285714285714285
0.14285714285714285 x 100 = 14.29%