83% is the change from 353 to 646
Calculation steps:
[( 646 - 353 ) ÷ 353] x 100 = 83%
Formula
Percentage change = [(646 - 353) / 353] x 100
Subtract the new number by the original number
646 - 353 = 293
293 ÷ 353 = 0.830028328611898
0.830028328611898 x 100 = 83%