-34.07% is the change from 270 to 178
Calculation steps:
[( 178 - 270 ) ÷ 270] x 100 = -34.07%
Formula
Percentage change = [(178 - 270) / 270] x 100
Subtract the new number by the original number
178 - 270 = -92
-92 ÷ 270 = -0.34074074074074073
-0.34074074074074073 x 100 = -34.07%