-85% is the change from 240 to 36
Calculation steps:
[( 36 - 240 ) ÷ 240] x 100 = -85%
Formula
Percentage change = [(36 - 240) / 240] x 100
Subtract the new number by the original number
36 - 240 = -204
-204 ÷ 240 = -0.85
-0.85 x 100 = -85%
Example