-64.07% is the change from 270 to 97
Calculation steps:
[( 97 - 270 ) ÷ 270] x 100 = -64.07%
Formula
Percentage change = [(97 - 270) / 270] x 100
Subtract the new number by the original number
97 - 270 = -173
-173 ÷ 270 = -0.6407407407407407
-0.6407407407407407 x 100 = -64.07%