204.29% is the change from 210 to 639
Calculation steps:
[( 639 - 210 ) ÷ 210] x 100 = 204.29%
Formula
Percentage change = [(639 - 210) / 210] x 100
Subtract the new number by the original number
639 - 210 = 429
429 ÷ 210 = 2.0428571428571427
2.0428571428571427 x 100 = 204.29%