16.88% is the change from 551 to 644
Calculation steps:
[( 644 - 551 ) ÷ 551] x 100 = 16.88%
Formula
Percentage change = [(644 - 551) / 551] x 100
Subtract the new number by the original number
644 - 551 = 93
93 ÷ 551 = 0.16878402903811252
0.16878402903811252 x 100 = 16.88%