43.02% is the change from 451 to 645
Calculation steps:
[( 645 - 451 ) ÷ 451] x 100 = 43.02%
Formula
Percentage change = [(645 - 451) / 451] x 100
Subtract the new number by the original number
645 - 451 = 194
194 ÷ 451 = 0.43015521064301554
0.43015521064301554 x 100 = 43.02%