207.14% is the change from 210 to 645
Calculation steps:
[( 645 - 210 ) ÷ 210] x 100 = 207.14%
Formula
Percentage change = [(645 - 210) / 210] x 100
Subtract the new number by the original number
645 - 210 = 435
435 ÷ 210 = 2.0714285714285716
2.0714285714285716 x 100 = 207.14%