104.21% is the change from 451 to 921
Calculation steps:
[( 921 - 451 ) ÷ 451] x 100 = 104.21%
Formula
Percentage change = [(921 - 451) / 451] x 100
Subtract the new number by the original number
921 - 451 = 470
470 ÷ 451 = 1.042128603104213
1.042128603104213 x 100 = 104.21%