38.57% is the change from 210 to 291
Calculation steps:
[( 291 - 210 ) ÷ 210] x 100 = 38.57%
Formula
Percentage change = [(291 - 210) / 210] x 100
Subtract the new number by the original number
291 - 210 = 81
81 ÷ 210 = 0.38571428571428573
0.38571428571428573 x 100 = 38.57%