2142.5% is the change from 40 to 897
Calculation steps:
[( 897 - 40 ) ÷ 40] x 100 = 2142.5%
Formula
Percentage change = [(897 - 40) / 40] x 100
Subtract the new number by the original number
897 - 40 = 857
857 ÷ 40 = 21.425
21.425 x 100 = 2142.5%
Example