207.62% is the change from 210 to 646
Calculation steps:
[( 646 - 210 ) ÷ 210] x 100 = 207.62%
Formula
Percentage change = [(646 - 210) / 210] x 100
Subtract the new number by the original number
646 - 210 = 436
436 ÷ 210 = 2.0761904761904764
2.0761904761904764 x 100 = 207.62%