-90% is the change from 360 to 36
Calculation steps:
[( 36 - 360 ) ÷ 360] x 100 = -90%
Formula
Percentage change = [(36 - 360) / 360] x 100
Subtract the new number by the original number
36 - 360 = -324
-324 ÷ 360 = -0.9
-0.9 x 100 = -90%
Example