-92.78% is the change from 97 to 7
Calculation steps:
[( 7 - 97 ) ÷ 97] x 100 = -92.78%
Formula
Percentage change = [(7 - 97) / 97] x 100
Subtract the new number by the original number
7 - 97 = -90
-90 ÷ 97 = -0.9278350515463918
-0.9278350515463918 x 100 = -92.78%