-69.07% is the change from 97 to 30
Calculation steps:
[( 30 - 97 ) ÷ 97] x 100 = -69.07%
Formula
Percentage change = [(30 - 97) / 97] x 100
Subtract the new number by the original number
30 - 97 = -67
-67 ÷ 97 = -0.6907216494845361
-0.6907216494845361 x 100 = -69.07%