217.73% is the change from 203 to 645
Calculation steps:
[( 645 - 203 ) ÷ 203] x 100 = 217.73%
Formula
Percentage change = [(645 - 203) / 203] x 100
Subtract the new number by the original number
645 - 203 = 442
442 ÷ 203 = 2.1773399014778323
2.1773399014778323 x 100 = 217.73%