-7.69% is the change from 91 to 84
Calculation steps:
[( 84 - 91 ) ÷ 91] x 100 = -7.69%
Formula
Percentage change = [(84 - 91) / 91] x 100
Subtract the new number by the original number
84 - 91 = -7
-7 ÷ 91 = -0.07692307692307693
-0.07692307692307693 x 100 = -7.69%