527.5% is the change from 40 to 251
Calculation steps:
[( 251 - 40 ) ÷ 40] x 100 = 527.5%
Formula
Percentage change = [(251 - 40) / 40] x 100
Subtract the new number by the original number
251 - 40 = 211
211 ÷ 40 = 5.275
5.275 x 100 = 527.5%
Example