-85.63% is the change from 355 to 51
Calculation steps:
[( 51 - 355 ) ÷ 355] x 100 = -85.63%
Formula
Percentage change = [(51 - 355) / 355] x 100
Subtract the new number by the original number
51 - 355 = -304
-304 ÷ 355 = -0.856338028169014
-0.856338028169014 x 100 = -85.63%