1020% is the change from 40 to 448
Calculation steps:
[( 448 - 40 ) ÷ 40] x 100 = 1020%
Formula
Percentage change = [(448 - 40) / 40] x 100
Subtract the new number by the original number
448 - 40 = 408
408 ÷ 40 = 10.2
10.2 x 100 = 1020%
Example