16.52% is the change from 551 to 642
Calculation steps:
[( 642 - 551 ) ÷ 551] x 100 = 16.52%
Formula
Percentage change = [(642 - 551) / 551] x 100
Subtract the new number by the original number
642 - 551 = 91
91 ÷ 551 = 0.16515426497277677
0.16515426497277677 x 100 = 16.52%