81.1% is the change from 492 to 891
Calculation steps:
[( 891 - 492 ) ÷ 492] x 100 = 81.1%
Formula
Percentage change = [(891 - 492) / 492] x 100
Subtract the new number by the original number
891 - 492 = 399
399 ÷ 492 = 0.8109756097560976
0.8109756097560976 x 100 = 81.1%