-26.3% is the change from 270 to 199
Calculation steps:
[( 199 - 270 ) ÷ 270] x 100 = -26.3%
Formula
Percentage change = [(199 - 270) / 270] x 100
Subtract the new number by the original number
199 - 270 = -71
-71 ÷ 270 = -0.26296296296296295
-0.26296296296296295 x 100 = -26.3%