-86.07% is the change from 366 to 51
Calculation steps:
[( 51 - 366 ) ÷ 366] x 100 = -86.07%
Formula
Percentage change = [(51 - 366) / 366] x 100
Subtract the new number by the original number
51 - 366 = -315
-315 ÷ 366 = -0.860655737704918
-0.860655737704918 x 100 = -86.07%