-60% is the change from 270 to 108
Calculation steps:
[( 108 - 270 ) ÷ 270] x 100 = -60%
Formula
Percentage change = [(108 - 270) / 270] x 100
Subtract the new number by the original number
108 - 270 = -162
-162 ÷ 270 = -0.6
-0.6 x 100 = -60%
Example