197.24% is the change from 217 to 645
Calculation steps:
[( 645 - 217 ) ÷ 217] x 100 = 197.24%
Formula
Percentage change = [(645 - 217) / 217] x 100
Subtract the new number by the original number
645 - 217 = 428
428 ÷ 217 = 1.9723502304147464
1.9723502304147464 x 100 = 197.24%