83.67% is the change from 539 to 990
Calculation steps:
[( 990 - 539 ) ÷ 539] x 100 = 83.67%
Formula
Percentage change = [(990 - 539) / 539] x 100
Subtract the new number by the original number
990 - 539 = 451
451 ÷ 539 = 0.8367346938775511
0.8367346938775511 x 100 = 83.67%