-98.52% is the change from 270 to 4
Calculation steps:
[( 4 - 270 ) ÷ 270] x 100 = -98.52%
Formula
Percentage change = [(4 - 270) / 270] x 100
Subtract the new number by the original number
4 - 270 = -266
-266 ÷ 270 = -0.9851851851851852
-0.9851851851851852 x 100 = -98.52%