213.59% is the change from 206 to 646
Calculation steps:
[( 646 - 206 ) ÷ 206] x 100 = 213.59%
Formula
Percentage change = [(646 - 206) / 206] x 100
Subtract the new number by the original number
646 - 206 = 440
440 ÷ 206 = 2.1359223300970873
2.1359223300970873 x 100 = 213.59%