62.47% is the change from 397 to 645
Calculation steps:
[( 645 - 397 ) ÷ 397] x 100 = 62.47%
Formula
Percentage change = [(645 - 397) / 397] x 100
Subtract the new number by the original number
645 - 397 = 248
248 ÷ 397 = 0.6246851385390428
0.6246851385390428 x 100 = 62.47%