545% is the change from 40 to 258
Calculation steps:
[( 258 - 40 ) ÷ 40] x 100 = 545%
Formula
Percentage change = [(258 - 40) / 40] x 100
Subtract the new number by the original number
258 - 40 = 218
218 ÷ 40 = 5.45
5.45 x 100 = 545%
Example