95.5% is the change from 511 to 999
Calculation steps:
[( 999 - 511 ) ÷ 511] x 100 = 95.5%
Formula
Percentage change = [(999 - 511) / 511] x 100
Subtract the new number by the original number
999 - 511 = 488
488 ÷ 511 = 0.9549902152641878
0.9549902152641878 x 100 = 95.5%