21.18% is the change from 817 to 990
Calculation steps:
[( 990 - 817 ) ÷ 817] x 100 = 21.18%
Formula
Percentage change = [(990 - 817) / 817] x 100
Subtract the new number by the original number
990 - 817 = 173
173 ÷ 817 = 0.211750305997552
0.211750305997552 x 100 = 21.18%