-17.58% is the change from 91 to 75
Calculation steps:
[( 75 - 91 ) ÷ 91] x 100 = -17.58%
Formula
Percentage change = [(75 - 91) / 91] x 100
Subtract the new number by the original number
75 - 91 = -16
-16 ÷ 91 = -0.17582417582417584
-0.17582417582417584 x 100 = -17.58%