-7.22% is the change from 97 to 90
Calculation steps:
[( 90 - 97 ) ÷ 97] x 100 = -7.22%
Formula
Percentage change = [(90 - 97) / 97] x 100
Subtract the new number by the original number
90 - 97 = -7
-7 ÷ 97 = -0.07216494845360824
-0.07216494845360824 x 100 = -7.22%