81.6% is the change from 549 to 997
Calculation steps:
[( 997 - 549 ) ÷ 549] x 100 = 81.6%
Formula
Percentage change = [(997 - 549) / 549] x 100
Subtract the new number by the original number
997 - 549 = 448
448 ÷ 549 = 0.8160291438979964
0.8160291438979964 x 100 = 81.6%