2150% is the change from 2 to 45
Calculation steps:
[( 45 - 2 ) ÷ 2] x 100 = 2150%
Formula
Percentage change = [(45 - 2) / 2] x 100
Subtract the new number by the original number
45 - 2 = 43
43 ÷ 2 = 21.5
21.5 x 100 = 2150%
Example