54.64% is the change from 646 to 999
Calculation steps:
[( 999 - 646 ) ÷ 646] x 100 = 54.64%
Formula
Percentage change = [(999 - 646) / 646] x 100
Subtract the new number by the original number
999 - 646 = 353
353 ÷ 646 = 0.5464396284829721
0.5464396284829721 x 100 = 54.64%