-7.8% is the change from 936 to 863
Calculation steps:
[( 863 - 936 ) ÷ 936] x 100 = -7.8%
Formula
Percentage change = [(863 - 936) / 936] x 100
Subtract the new number by the original number
863 - 936 = -73
-73 ÷ 936 = -0.07799145299145299
-0.07799145299145299 x 100 = -7.8%