-5.55% is the change from 991 to 936
Calculation steps:
[( 936 - 991 ) ÷ 991] x 100 = -5.55%
Formula
Percentage change = [(936 - 991) / 991] x 100
Subtract the new number by the original number
936 - 991 = -55
-55 ÷ 991 = -0.055499495459132187
-0.055499495459132187 x 100 = -5.55%