87.5% is the change from 456 to 855
Calculation steps:
[( 855 - 456 ) ÷ 456] x 100 = 87.5%
Formula
Percentage change = [(855 - 456) / 456] x 100
Subtract the new number by the original number
855 - 456 = 399
399 ÷ 456 = 0.875
0.875 x 100 = 87.5%
Example