81.27% is the change from 550 to 997
Calculation steps:
[( 997 - 550 ) ÷ 550] x 100 = 81.27%
Formula
Percentage change = [(997 - 550) / 550] x 100
Subtract the new number by the original number
997 - 550 = 447
447 ÷ 550 = 0.8127272727272727
0.8127272727272727 x 100 = 81.27%