69.04% is the change from 591 to 999
Calculation steps:
[( 999 - 591 ) ÷ 591] x 100 = 69.04%
Formula
Percentage change = [(999 - 591) / 591] x 100
Subtract the new number by the original number
999 - 591 = 408
408 ÷ 591 = 0.6903553299492385
0.6903553299492385 x 100 = 69.04%