8.6% is the change from 593 to 644
Calculation steps:
[( 644 - 593 ) ÷ 593] x 100 = 8.6%
Formula
Percentage change = [(644 - 593) / 593] x 100
Subtract the new number by the original number
644 - 593 = 51
51 ÷ 593 = 0.08600337268128162
0.08600337268128162 x 100 = 8.6%