-50.73% is the change from 548 to 270
Calculation steps:
[( 270 - 548 ) ÷ 548] x 100 = -50.73%
Formula
Percentage change = [(270 - 548) / 548] x 100
Subtract the new number by the original number
270 - 548 = -278
-278 ÷ 548 = -0.5072992700729927
-0.5072992700729927 x 100 = -50.73%