15.52% is the change from 554 to 640
Calculation steps:
[( 640 - 554 ) ÷ 554] x 100 = 15.52%
Formula
Percentage change = [(640 - 554) / 554] x 100
Subtract the new number by the original number
640 - 554 = 86
86 ÷ 554 = 0.1552346570397112
0.1552346570397112 x 100 = 15.52%