8.61% is the change from 592 to 643
Calculation steps:
[( 643 - 592 ) ÷ 592] x 100 = 8.61%
Formula
Percentage change = [(643 - 592) / 592] x 100
Subtract the new number by the original number
643 - 592 = 51
51 ÷ 592 = 0.08614864864864864
0.08614864864864864 x 100 = 8.61%