16.7% is the change from 551 to 643
Calculation steps:
[( 643 - 551 ) ÷ 551] x 100 = 16.7%
Formula
Percentage change = [(643 - 551) / 551] x 100
Subtract the new number by the original number
643 - 551 = 92
92 ÷ 551 = 0.16696914700544466
0.16696914700544466 x 100 = 16.7%