68.47% is the change from 593 to 999
Calculation steps:
[( 999 - 593 ) ÷ 593] x 100 = 68.47%
Formula
Percentage change = [(999 - 593) / 593] x 100
Subtract the new number by the original number
999 - 593 = 406
406 ÷ 593 = 0.684654300168634
0.684654300168634 x 100 = 68.47%