-23.7% is the change from 270 to 206
Calculation steps:
[( 206 - 270 ) ÷ 270] x 100 = -23.7%
Formula
Percentage change = [(206 - 270) / 270] x 100
Subtract the new number by the original number
206 - 270 = -64
-64 ÷ 270 = -0.23703703703703705
-0.23703703703703705 x 100 = -23.7%