18.17% is the change from 545 to 644
Calculation steps:
[( 644 - 545 ) ÷ 545] x 100 = 18.17%
Formula
Percentage change = [(644 - 545) / 545] x 100
Subtract the new number by the original number
644 - 545 = 99
99 ÷ 545 = 0.181651376146789
0.181651376146789 x 100 = 18.17%